/* Base styles */
:root {
    --font-sans: 'Poppins', ui-sans-serif, system-ui, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --color-primary: #2563eb;
    --color-primary-light: #dbeafe;
    --color-gray-600: #3d444f;
    --color-gray-100: #f3f4f6;
    --color-gray-50: #f9fafb;
    --gradient-circle-large: 24rem;
    --gradient-circle-small: 20rem;
    --title-color: #2563eb;
    --container-opacity: 0.7;
    --container-bg: rgba(255, 255, 255, 0.7);
    --container-radius: 1rem;
    --blur-strength: 12px;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --bg-color: #ffffff;
    --bg-color-secondary: #f8fafc;
    --text-color: #1a1a1a;
    --textarea-bg: white;
    --textarea-border: #e5e7eb;
    --gradient-opacity: 0.15;
    --button-hover-bg: #f8fafc;
    --button-active-bg: #f1f5f9;
    --transition-base: 0.2s ease;
}

/* Dark mode */
[data-theme="dark"] {
    --bg-color: #0f172a;
    --bg-color-secondary: #1e293b;
    --text-color: #f3f4f6;
    --text-color-secondary: #9ca3af;
    --container-bg: rgba(30, 41, 59, 0.7);
    --textarea-bg: var(--bg-color-secondary);
    --textarea-border: #334155;
    --gradient-opacity: 0.2;
    --title-color: #60a5fa;
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
    --color-primary: #60a5fa;
    --color-primary-light: rgba(96, 165, 250, 0.1);
    --color-gray-600: #94a3b8;
    --color-gray-100: var(--bg-color);
    --color-gray-50: var(--bg-color);
    --card-bg: var(--bg-color);
    --border-color: #334155;
    --hover-color: #1e293b;
    --hover-bg: #334155;
    --btn-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    --btn-shadow-hover: 0 4px 6px rgba(0, 0, 0, 0.2);
    --btn-bg: #282f3c;
}

/* Dark mode specific styles */
[data-theme="dark"] .modern-textarea {
    background: var(--textarea-bg);
    color: var(--text-color);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .modern-textarea:focus {
    border-color: var(--color-primary);
    background: var(--textarea-bg);
}

[data-theme="dark"] .modern-textarea.output {
    background: var(--bg-color-secondary);
    color: var(--text-color);
}

[data-theme="dark"] .pill-select {
    background: var(--textarea-bg);
    color: var(--text-color);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .pill-select:focus {
    border-color: var(--color-primary);
}

[data-theme="dark"] .pill-btn.secondary {
    background: var(--bg-color-secondary);
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .pill-btn.secondary:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .paste-btn {
    background: var(--btn-bg);
    border-color: var(--textarea-border);
    color: var(--text-color);
}

[data-theme="dark"] .paste-btn:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .paste-btn i {
    color: var(--color-primary);
}

[data-theme="dark"] .theme-toggle {
    background: var(--textarea-bg);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .card {
    background: rgba(31, 41, 55, 0.7);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .main-title-bold {
    color: var(--text-color);
}

/* Body */
body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* App container */
.app-container {
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    position: relative;
    overflow: hidden;
}

/* Gradient circles */
.gradient-circle {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
}

.gradient-circle-blue {
    width: 600px;
    height: 600px;
    background: linear-gradient(45deg, #3b82f6, #60a5fa);
    top: -200px;
    right: -100px;
}

.gradient-circle-purple {
    width: 500px;
    height: 500px;
    background: linear-gradient(45deg, #8b5cf6, #a78bfa);
    bottom: -150px;
    left: -100px;
}

/* Gradient background */
.gradient-bg {
    min-height: 100vh;
    background: linear-gradient(120deg, #e0e7ff 0%, #f0f4ff 100%);
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Theme toggle */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: var(--container-bg);
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--blur-strength));
    cursor: pointer;
    z-index: 100;
    transition: background 0.3s ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-icon {
    display: block;
    transition: transform 0.3s ease;
    width: 18px;
    height: 18px;
}

.theme-toggle:hover #theme-icon {
    transform: rotate(90deg);
}

/* Centered card */
.center-card {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Card */
.card {
    background: var(--container-bg);
    box-shadow: var(--glass-shadow);
    border-radius: var(--container-radius);
    border: 1.5px solid var(--glass-border);
    backdrop-filter: blur(var(--blur-strength));
    padding: 2.5rem 2rem;
    max-width: 1000px;
    width: 90%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* Title */
.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -1.5px;
}

.main-title-bold {
    color: #22223b;
}

.main-title-gradient {
    background: linear-gradient(to right, #1696f5, #64acfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    line-height: 1;
}

/* Input container and paste button */
.input-container {
    position: relative;
    width: 100%;
}

.paste-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--textarea-bg);
    border: 1px solid var(--textarea-border);
    border-radius: 0.5rem;
    color: var(--text-color);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.8;
}

.paste-btn:hover {
    opacity: 1;
    background: var(--button-hover-bg);
    border-color: var(--color-primary);
}

.paste-btn:active {
    background: var(--button-active-bg);
}

.paste-btn i {
    width: 1.125rem;
    height: 1.125rem;
    color: var(--color-primary);
}

/* Modern textarea */
.modern-textarea {
    width: 100%;
    min-height: 120px;
    border: 1.5px solid var(--textarea-border);
    border-radius: 1rem;
    padding: 1rem;
    font-size: 1rem;
    font-family: var(--font-mono);
    background: var(--textarea-bg);
    color: var(--text-color);
    resize: none;
    overflow-y: auto;
    transition: border 0.2s ease;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.modern-textarea::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.modern-textarea:focus {
    border-color: var(--color-primary);
    outline: none;
}

.modern-textarea.output {
    background: var(--button-hover-bg);
    color: var(--text-color);
    min-height: 100px;
}

/* Pill buttons and select */
.pill-btn-group {
    display: flex;
    gap: 0.75rem;
    margin: 0.5rem 0;
    flex-wrap: wrap;
}

.pill-select {
    position: relative;
    display: inline-block;
    min-width: 300px;
    margin: 0 10px;
    border: 1px solid var(--textarea-border);
    border-radius: 4px;
    background-color: var(--textarea-bg);
    padding: 5px;
}

.pill-select select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 100%;
    padding: 20px 45px 20px 25px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.5;
    height: 65px;
}

.pill-select select:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.pill-select select:focus {
    outline: none;
    background-color: rgba(99, 102, 241, 0.1);
}

.pill-select::after {
    content: '';
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 7px solid var(--text-color);
    pointer-events: none;
    transition: transform 0.3s ease;
}

.pill-select:hover::after {
    transform: translateY(-50%) rotate(180deg);
}

/* Style for the options */
.pill-select select option {
    padding: 20px 25px;
    background-color: var(--textarea-bg);
    color: var(--text-color);
    border: 1px solid var(--textarea-border);
    border-radius: 3px;
    margin: 4px 0;
    font-size: 16px;
    line-height: 2;
    height: 50px;
    letter-spacing: 0.5px;
}

/* Dark theme specific styles */
[data-theme="dark"] .pill-select {
    background-color: var(--btn-bg);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .pill-select select {
    background-color: transparent;
}

[data-theme="dark"] .pill-select select option {
    background-color: var(--btn-bg);
    color: var(--text-color);
}

.pill-btn {
    border-radius: 999px;
    border: none;
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pill-btn.primary {
    background: var(--color-primary);
    color: white;
}

.pill-btn.primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.pill-btn.primary:active {
    transform: translateY(0);
}

.pill-btn.secondary {
    background: var(--button-hover-bg);
    color: var(--text-color);
    border: 1px solid var(--textarea-border);
}

.pill-btn.secondary:hover {
    background: var(--button-active-bg);
    border-color: var(--color-primary);
}

/* Bottom buttons */
.bottom-btns {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Glass effect for elements */
.glass {
    position: relative;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(2px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 2rem;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2), 
                inset 0 4px 20px rgba(255, 255, 255, 0.3);
}

/* Additional styles for a modern look */
.button {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.button:hover {
    transform: translateY(-2px);
}

.button:active {
    transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }

    .card {
        width: 95%;
        padding: 2rem 1.5rem;
    }

    .paste-btn {
        padding: 0.375rem;
        border-radius: 0.375rem;
    }

    .paste-btn span {
        display: none;
    }
    
    .paste-btn i {
        margin: 0;
    }
    
    .modern-textarea {
        padding-right: 3rem;
    }

    .pill-btn-group {
        gap: 0.5rem;
    }

    .pill-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-color);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--color-primary-light);
}

.footer .heart {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
}

[data-theme="dark"] .footer {
    color: var(--text-color-secondary);
}

[data-theme="dark"] .footer a {
    color: var(--color-primary);
}

[data-theme="dark"] .footer a:hover {
    color: #93c5fd;
}

.copy-btn {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #6366f1;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.copy-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-1px);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
    stroke: #6366f1;
}

/* Dark theme specific styles */
[data-theme="dark"] .copy-btn {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.4);
    color: #818cf8;
}

[data-theme="dark"] .copy-btn:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.6);
}

[data-theme="dark"] .copy-btn svg {
    stroke: #818cf8;
}

/* Shortcuts Alert */
.shortcuts-alert {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.98);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    font-size: 13px;
    color: #4b5563;
    z-index: 1000;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(99, 102, 241, 0.08);
    min-width: 240px;
    pointer-events: auto;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.shortcuts-alert.visible {
    opacity: 1;
    transform: translateY(0);
}

.shortcuts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.08);
}

.shortcuts-title {
    font-weight: 600;
    color: #6366f1;
    font-size: 14px;
    letter-spacing: -0.01em;
}

.shortcuts-close {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: #6366f1;
    opacity: 0.6;
    transition: all 0.2s ease;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shortcuts-close:hover {
    opacity: 1;
    background: rgba(99, 102, 241, 0.08);
}

.shortcuts-close i {
    width: 16px;
    height: 16px;
}

.shortcuts-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.shortcuts-list li {
    margin: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #6b7280;
    padding: 6px 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.shortcuts-list li:hover {
    background: rgba(99, 102, 241, 0.04);
}

.shortcuts-list kbd {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #f3f4f6;
    padding: 4px 8px;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
    color: #4b5563;
    border: 1px solid #e5e7eb;
    min-width: 28px;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.shortcuts-list kbd kbd {
    background: #fff;
    padding: 2px 6px;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    box-shadow: 0 1px 1px rgba(0, 0, 0, 0.05);
}

.shortcuts-list li:hover kbd {
    background: #eef2ff;
    border-color: #c7d2fe;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.shortcuts-list li:hover kbd kbd {
    background: #fff;
    border-color: #c7d2fe;
}

.shortcuts-list span {
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    transition: all 0.2s ease;
}

.shortcuts-list li:hover span {
    color: #6366f1;
}

/* Dark theme styles */
[data-theme="dark"] .shortcuts-alert {
    background: rgba(17, 24, 39, 0.98);
    color: #e5e7eb;
    border-color: rgba(99, 102, 241, 0.12);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .shortcuts-title {
    color: #818cf8;
}

[data-theme="dark"] .shortcuts-close {
    color: #818cf8;
}

[data-theme="dark"] .shortcuts-close:hover {
    background: rgba(99, 102, 241, 0.12);
}

[data-theme="dark"] .shortcuts-list li {
    color: #9ca3af;
}

[data-theme="dark"] .shortcuts-list li:hover {
    background: rgba(99, 102, 241, 0.08);
}

/* Base styles */
:root {
    --font-sans: 'Poppins', ui-sans-serif, system-ui, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    --color-primary: #2563eb;
    --color-primary-light: #dbeafe;
    --color-gray-600: #3d444f;
    --color-gray-100: #f3f4f6;
    --color-gray-50: #f9fafb;
    --gradient-circle-large: 24rem;
    --gradient-circle-small: 20rem;
    --title-color: #2563eb;
    --container-opacity: 0.7;
    --container-bg: rgba(255, 255, 255, 0.7);
    --container-radius: 1rem;
    --blur-strength: 12px;
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.15);
    --bg-color: #ffffff;
    --bg-color-secondary: #f8fafc;
    --text-color: #1a1a1a;
    --textarea-bg: white;
    --textarea-border: #e5e7eb;
    --gradient-opacity: 0.15;
    --button-hover-bg: #f8fafc;
    --button-active-bg: #f1f5f9;
    --transition-base: 0.2s ease;
}

/* Dark mode */
[data-theme="dark"] {
    --bg-color: #0f172a;
    --bg-color-secondary: #1e293b;
    --text-color: #f3f4f6;
    --text-color-secondary: #9ca3af;
    --container-bg: rgba(30, 41, 59, 0.7);
    --textarea-bg: var(--bg-color-secondary);
    --textarea-border: #334155;
    --gradient-opacity: 0.2;
    --title-color: #60a5fa;
    --glass-border: rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
    --color-primary: #60a5fa;
    --color-primary-light: rgba(96, 165, 250, 0.1);
    --color-gray-600: #94a3b8;
    --color-gray-100: var(--bg-color);
    --color-gray-50: var(--bg-color);
    --card-bg: var(--bg-color);
    --border-color: #334155;
    --hover-color: #1e293b;
    --hover-bg: #334155;
    --btn-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    --btn-shadow-hover: 0 4px 6px rgba(0, 0, 0, 0.2);
    --btn-bg: #282f3c;
}

/* Dark mode specific styles */
[data-theme="dark"] .modern-textarea {
    background: var(--textarea-bg);
    color: var(--text-color);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .modern-textarea:focus {
    border-color: var(--color-primary);
    background: var(--textarea-bg);
}

[data-theme="dark"] .modern-textarea.output {
    background: var(--bg-color-secondary);
    color: var(--text-color);
}

[data-theme="dark"] .pill-select {
    background: var(--textarea-bg);
    color: var(--text-color);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .pill-select:focus {
    border-color: var(--color-primary);
}

[data-theme="dark"] .pill-btn.secondary {
    background: var(--bg-color-secondary);
    color: var(--text-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .pill-btn.secondary:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .paste-btn {
    background: var(--btn-bg);
    border-color: var(--textarea-border);
    color: var(--text-color);
}

[data-theme="dark"] .paste-btn:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .paste-btn i {
    color: var(--color-primary);
}

[data-theme="dark"] .theme-toggle {
    background: var(--textarea-bg);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--hover-bg);
    border-color: var(--color-primary);
}

[data-theme="dark"] .card {
    background: rgba(31, 41, 55, 0.7);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .main-title-bold {
    color: var(--text-color);
}

/* Body */
body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    position: relative;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* App container */
.app-container {
    min-height: 100vh;
    background-color: var(--bg-color);
    color: var(--text-color);
    position: relative;
    overflow: hidden;
}

/* Gradient circles */
.gradient-circle {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
}

.gradient-circle-blue {
    width: 600px;
    height: 600px;
    background: linear-gradient(45deg, #3b82f6, #60a5fa);
    top: -200px;
    right: -100px;
}

.gradient-circle-purple {
    width: 500px;
    height: 500px;
    background: linear-gradient(45deg, #8b5cf6, #a78bfa);
    bottom: -150px;
    left: -100px;
}

/* Gradient background */
.gradient-bg {
    min-height: 100vh;
    background: linear-gradient(120deg, #e0e7ff 0%, #f0f4ff 100%);
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Theme toggle */
.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    border-radius: 0.5rem;
    background: var(--container-bg);
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--blur-strength));
    cursor: pointer;
    z-index: 100;
    transition: background 0.3s ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-icon {
    display: block;
    transition: transform 0.3s ease;
    width: 18px;
    height: 18px;
}

.theme-toggle:hover #theme-icon {
    transform: rotate(90deg);
}

/* Centered card */
.center-card {
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Card */
.card {
    background: var(--container-bg);
    box-shadow: var(--glass-shadow);
    border-radius: var(--container-radius);
    border: 1.5px solid var(--glass-border);
    backdrop-filter: blur(var(--blur-strength));
    padding: 2.5rem 2rem;
    max-width: 1000px;
    width: 90%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

/* Title */
.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    letter-spacing: -1.5px;
}

.main-title-bold {
    color: #22223b;
}

.main-title-gradient {
    background: linear-gradient(to right, #1696f5, #64acfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    line-height: 1;
}

/* Input container and paste button */
.input-container {
    position: relative;
    width: 100%;
}

.paste-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--textarea-bg);
    border: 1px solid var(--textarea-border);
    border-radius: 0.5rem;
    color: var(--text-color);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    opacity: 0.8;
}

.paste-btn:hover {
    opacity: 1;
    background: var(--button-hover-bg);
    border-color: var(--color-primary);
}

.paste-btn:active {
    background: var(--button-active-bg);
}

.paste-btn i {
    width: 1.125rem;
    height: 1.125rem;
    color: var(--color-primary);
}

/* Modern textarea */
.modern-textarea {
    width: 100%;
    min-height: 120px;
    border: 1.5px solid var(--textarea-border);
    border-radius: 1rem;
    padding: 1rem;
    font-size: 1rem;
    font-family: var(--font-mono);
    background: var(--textarea-bg);
    color: var(--text-color);
    resize: none;
    overflow-y: auto;
    transition: border 0.2s ease;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
}

.modern-textarea::-webkit-scrollbar {
    display: none; /* Chrome, Safari and Opera */
}

.modern-textarea:focus {
    border-color: var(--color-primary);
    outline: none;
}

.modern-textarea.output {
    background: var(--button-hover-bg);
    color: var(--text-color);
    min-height: 100px;
}

/* Pill buttons and select */
.pill-btn-group {
    display: flex;
    gap: 0.75rem;
    margin: 0.5rem 0;
    flex-wrap: wrap;
}

.pill-select {
    position: relative;
    display: inline-block;
    min-width: 300px;
    margin: 0 10px;
    border: 1px solid var(--textarea-border);
    border-radius: 4px;
    background-color: var(--textarea-bg);
    padding: 5px;
}

.pill-select select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    width: 100%;
    padding: 20px 45px 20px 25px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1.5;
    height: 65px;
}

.pill-select select:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.pill-select select:focus {
    outline: none;
    background-color: rgba(99, 102, 241, 0.1);
}

.pill-select::after {
    content: '';
    position: absolute;
    right: 30px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 7px solid transparent;
    border-right: 7px solid transparent;
    border-top: 7px solid var(--text-color);
    pointer-events: none;
    transition: transform 0.3s ease;
}

.pill-select:hover::after {
    transform: translateY(-50%) rotate(180deg);
}

/* Style for the options */
.pill-select select option {
    padding: 20px 25px;
    background-color: var(--textarea-bg);
    color: var(--text-color);
    border: 1px solid var(--textarea-border);
    border-radius: 3px;
    margin: 4px 0;
    font-size: 16px;
    line-height: 2;
    height: 50px;
    letter-spacing: 0.5px;
}

/* Dark theme specific styles */
[data-theme="dark"] .pill-select {
    background-color: var(--btn-bg);
    border-color: var(--textarea-border);
}

[data-theme="dark"] .pill-select select {
    background-color: transparent;
}

[data-theme="dark"] .pill-select select option {
    background-color: var(--btn-bg);
    color: var(--text-color);
}

.pill-btn {
    border-radius: 999px;
    border: none;
    padding: 0.5rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.pill-btn.primary {
    background: var(--color-primary);
    color: white;
}

.pill-btn.primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

.pill-btn.primary:active {
    transform: translateY(0);
}

.pill-btn.secondary {
    background: var(--button-hover-bg);
    color: var(--text-color);
    border: 1px solid var(--textarea-border);
}

.pill-btn.secondary:hover {
    background: var(--button-active-bg);
    border-color: var(--color-primary);
}

/* Bottom buttons */
.bottom-btns {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Glass effect for elements */
.glass {
    position: relative;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(2px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: 2rem;
    box-shadow: 0 8px 32px rgba(31, 38, 135, 0.2), 
                inset 0 4px 20px rgba(255, 255, 255, 0.3);
}

/* Additional styles for a modern look */
.button {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s, transform 0.2s;
}

.button:hover {
    transform: translateY(-2px);
}

.button:active {
    transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }

    .card {
        width: 95%;
        padding: 2rem 1.5rem;
    }

    .paste-btn {
        padding: 0.375rem;
        border-radius: 0.375rem;
    }

    .paste-btn span {
        display: none;
    }
    
    .paste-btn i {
        margin: 0;
    }
    
    .modern-textarea {
        padding-right: 3rem;
    }

    .pill-btn-group {
        gap: 0.5rem;
    }

    .pill-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-color);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: var(--color-primary-light);
}

.footer .heart {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
}

[data-theme="dark"] .footer {
    color: var(--text-color-secondary);
}

[data-theme="dark"] .footer a {
    color: var(--color-primary);
}

[data-theme="dark"] .footer a:hover {
    color: #93c5fd;
}

.copy-btn {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: #6366f1;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.copy-btn:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-1px);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
    stroke: #6366f1;
}

/* Dark theme specific styles */
[data-theme="dark"] .copy-btn {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.4);
    color: #818cf8;
}

[data-theme="dark"] .copy-btn:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: rgba(99, 102, 241, 0.6);
}

[data-theme="dark"] .copy-btn svg {
    stroke: #818cf8;
}

/* Shortcuts Alert */
.shortcuts-alert {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: rgba(255, 255, 255, 0.98);
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    font-size: 13px;
    color: #4b5563;
    z-index: 1000;
    backdrop-filter: blur(12px);
    border: 1px solid rgba(99, 102, 241, 0.08);
    min-width: 240px;
    pointer-events: auto;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.shortcuts-alert.visible {
    opacity: 1;
    transform: translateY(0);
}

.shortcuts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(99, 102, 241, 0.08);
}

.shortcuts-title {
    font-weight: 600;
    color: #6366f1;
    font-size: 14px;
    letter-spacing: -0.01em;
}

.shortcuts-close {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: #6366f1;
    opacity: 0.6;
    transition: all 0.2s ease;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shortcuts-close:hover {
    opacity: 1;
    background: rgba(99, 102, 241, 0.08);
}

.shortcuts-close i {
    width: 16px;
    height: 16px;
}

.shortcuts-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.shortcuts-list li {
    margin: 10px 0;
    display: flex;
    align-items: center;
    gap: 12px;
    color: #6b7280;
    padding: 6px 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.shortcuts-list li:hover {
    background: rgba(99, 102, 241, 0.04);
}

.shortcuts-list kbd {
    background: rgba(99, 102, 241, 0.06);
    padding: 4px 8px;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
    color: #6366f1;
    border: 1px solid rgba(99, 102, 241, 0.1);
    min-width: 28px;
    text-align: center;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease;
}

.shortcuts-list li:hover kbd {
    background: rgba(99, 102, 241, 0.08);
    border-color: rgba(99, 102, 241, 0.15);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

.shortcuts-list span {
    font-size: 13px;
    font-weight: 500;
    color: #4b5563;
    transition: all 0.2s ease;
}

.shortcuts-list li:hover span {
    color: #6366f1;
}

/* Dark theme styles */
[data-theme="dark"] .shortcuts-alert {
    background: rgba(17, 24, 39, 0.98);
    color: #e5e7eb;
    border-color: rgba(99, 102, 241, 0.12);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .shortcuts-title {
    color: #818cf8;
}

[data-theme="dark"] .shortcuts-close {
    color: #818cf8;
}

[data-theme="dark"] .shortcuts-close:hover {
    background: rgba(99, 102, 241, 0.12);
}

[data-theme="dark"] .shortcuts-list li {
    color: #9ca3af;
}

[data-theme="dark"] .shortcuts-list li:hover {
    background: rgba(99, 102, 241, 0.08);
}

[data-theme="dark"] .shortcuts-list kbd {
    background: rgba(99, 102, 241, 0.12);
    color: #818cf8;
    border-color: rgba(99, 102, 241, 0.2);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .shortcuts-list li:hover kbd {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .shortcuts-list span {
    color: #e5e7eb;
}

[data-theme="dark"] .shortcuts-list li:hover span {
    color: #818cf8;
}

.textarea-container {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex: 1;
    min-height: 0;
}

.textarea-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.textarea-label {
    font-size: 14px;
    color: #4b5563;
    margin-bottom: 8px;
    font-weight: 500;
}

.textarea {
    flex: 1;
    min-height: 200px;
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    font-family: monospace;
    font-size: 14px;
    line-height: 1.5;
    resize: none;
    background: #fff;
    color: #1f2937;
    transition: all 0.2s ease;
}

.textarea:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Dark theme styles */
[data-theme="dark"] .textarea-label {
    color: #9ca3af;
}

[data-theme="dark"] .textarea {
    background: #1f2937;
    border-color: #374151;
    color: #e5e7eb;
}

[data-theme="dark"] .textarea:focus {
    border-color: #818cf8;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}