/* CSS Variables for Theming */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: rgba(148, 163, 184, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    --gradient-1: linear-gradient(135deg, #6366f1, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #06b6d4, #10b981);
    --gradient-3: linear-gradient(135deg, #f59e0b, #ef4444);
    
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f1f5f9;
    --bg-secondary: #e2e8f0;
    --bg-tertiary: #cbd5e1;
    --bg-card: rgba(255, 255, 255, 0.9);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    
    --border-color: rgba(51, 65, 85, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1);
    
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(0, 0, 0, 0.1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    transition: background 0.3s ease;
    background-image: 
        radial-gradient(ellipse at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 40% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

.container {
    display: flex;
    gap: 20px;
    max-width: 1200px;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
}

/* Calculator Main Container */
.calculator {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 24px;
    box-shadow: 
        0 25px 50px -12px var(--shadow-color),
        0 0 0 1px var(--glass-border);
    width: 100%;
    max-width: 420px;
    transition: all 0.3s ease;
}

.calculator:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 30px 60px -15px var(--shadow-color),
        0 0 0 1px var(--glass-border);
}

/* Header */
.calculator-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.calculator-header h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.calculator-header h1 i {
    color: var(--primary-color);
}

.mode-toggle {
    display: flex;
    gap: 10px;
}

.theme-btn, .history-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover, .history-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

/* Display Section */
.display-section {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 20px;
    min-height: 120px;
}

.expression {
    font-size: 1rem;
    color: var(--text-muted);
    min-height: 24px;
    word-wrap: break-word;
    text-align: right;
    margin-bottom: 8px;
}

.result {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    text-align: right;
    word-wrap: break-word;
    line-height: 1.2;
}

.voice-feedback {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.voice-feedback i {
    color: var(--accent-color);
}

.voice-feedback.listening {
    color: var(--success-color);
}

.voice-feedback.listening i {
    animation: pulse 1s infinite;
}

/* Voice Control Section */
.voice-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
}

.voice-button {
    position: relative;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
}

.voice-button:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.5);
}

.voice-button.listening {
    background: var(--gradient-2);
    box-shadow: 0 10px 30px rgba(16, 185, 129, 0.4);
}

.pulse-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid currentColor;
    opacity: 0;
}

.voice-button.listening .pulse-ring {
    animation: pulseRing 1.5s infinite;
}

@keyframes pulseRing {
    0% {
        width: 100%;
        height: 100%;
        opacity: 0.8;
    }
    100% {
        width: 150%;
        height: 150%;
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.voice-status {
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.voice-hint {
    margin-top: 5px;
    color: var(--accent-color);
    font-size: 0.75rem;
    font-style: italic;
    opacity: 0.8;
}

/* Mode Selector */
.mode-selector {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    overflow-x: auto;
    padding-bottom: 5px;
}

.mode-btn {
    flex: 1;
    min-width: 80px;
    padding: 10px 15px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.mode-btn:hover {
    background: var(--bg-tertiary);
}

.mode-btn.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
}

/* Button Grid */
.button-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.scientific-grid {
    grid-template-columns: repeat(5, 1fr);
    margin-bottom: 15px;
}

.programmer-grid {
    grid-template-columns: repeat(5, 1fr);
}

.basic-in-scientific {
    grid-template-columns: repeat(4, 1fr);
}

/* Buttons */
.btn {
    padding: 18px;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

.btn:hover {
    transform: translateY(-2px);
    background: var(--bg-tertiary);
}

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

.btn.number {
    background: var(--bg-secondary);
}

.btn.number:hover {
    background: var(--bg-tertiary);
}

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

.btn.operator:hover {
    background: var(--primary-hover);
}

.btn.equals {
    background: var(--gradient-2);
    color: white;
}

.btn.equals:hover {
    opacity: 0.9;
}

.btn.function {
    background: var(--bg-tertiary);
    color: var(--warning-color);
}

.btn.scientific {
    font-size: 0.9rem;
    padding: 14px 8px;
    background: rgba(139, 92, 246, 0.2);
    color: var(--secondary-color);
}

.btn.scientific:hover {
    background: rgba(139, 92, 246, 0.3);
}

.btn.programmer {
    font-size: 0.8rem;
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent-color);
}

.btn.hex-btn {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-color);
}

.btn.wide {
    grid-column: span 2;
}

/* Programmer Mode Specific */
.base-display {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
}

.base-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.base-row:last-child {
    border-bottom: none;
}

.base-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    width: 40px;
}

.base-value {
    font-family: 'Orbitron', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
    text-align: right;
    word-break: break-all;
}

.base-selector {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
}

.base-btn {
    flex: 1;
    padding: 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.base-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: transparent;
}

/* Converter Mode */
.converter-section {
    padding: 10px 0;
}

.converter-type select {
    width: 100%;
    padding: 12px 15px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
    margin-bottom: 20px;
}

.converter-inputs {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.converter-from, .converter-to {
    display: flex;
    gap: 10px;
}

.converter-from input, .converter-to input {
    flex: 1;
    padding: 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: 'Orbitron', sans-serif;
}

.converter-from input:focus, .converter-to input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.converter-from select, .converter-to select {
    width: 120px;
    padding: 15px 10px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    cursor: pointer;
}

.converter-arrow {
    text-align: center;
    color: var(--primary-color);
    font-size: 1.2rem;
    padding: 5px 0;
}

/* History Panel */
.history-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 24px;
    width: 100%;
    max-width: 320px;
    max-height: 600px;
    display: none;
    box-shadow: 
        0 25px 50px -12px var(--shadow-color),
        0 0 0 1px var(--glass-border);
}

.history-panel.show {
    display: block;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.history-header h2 {
    font-size: 1.1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.history-header h2 i {
    color: var(--primary-color);
}

.clear-history-btn {
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
}

.clear-history-btn:hover {
    background: var(--danger-color);
    color: white;
}

.history-list {
    overflow-y: auto;
    max-height: 450px;
}

.history-item {
    background: var(--glass-bg);
    border-radius: 10px;
    padding: 12px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.history-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.history-expression {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.history-result {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.history-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 5px;
}

.no-history {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 20px;
}

/* Voice Help Panel */
.voice-help {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.9);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.voice-help.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.voice-help h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.voice-help h3 i {
    color: var(--primary-color);
}

.help-content {
    display: grid;
    gap: 20px;
}

.help-category h4 {
    color: var(--primary-color);
    font-size: 1rem;
    margin-bottom: 10px;
}

.help-category ul {
    list-style: none;
}

.help-category li {
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.help-category li:last-child {
    border-bottom: none;
}

.close-help-btn {
    width: 100%;
    margin-top: 20px;
    padding: 15px;
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-help-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* Floating Help Button */
.floating-help-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-1);
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.4);
    transition: all 0.3s ease;
    z-index: 100;
}

.floating-help-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.5);
}

/* Hidden Class */
.hidden {
    display: none !important;
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.overlay.show {
    opacity: 1;
    visibility: visible;
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    padding: 15px 25px;
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    box-shadow: 0 10px 30px var(--shadow-color);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.info {
    border-left: 4px solid var(--accent-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
        align-items: center;
    }
    
    .calculator {
        max-width: 100%;
    }
    
    .history-panel {
        max-width: 100%;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        border-radius: 0;
        max-height: 100vh;
        z-index: 1000;
    }
    
    .btn {
        padding: 15px;
        font-size: 1rem;
    }
    
    .result {
        font-size: 2rem;
    }
    
    .scientific-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 6px;
    }
    
    .btn.scientific {
        padding: 12px 6px;
        font-size: 0.75rem;
    }
    
    .floating-help-btn {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 380px) {
    .calculator {
        padding: 15px;
    }
    
    .button-grid {
        gap: 6px;
    }
    
    .btn {
        padding: 12px;
        font-size: 0.9rem;
    }
    
    .mode-selector {
        gap: 5px;
    }
    
    .mode-btn {
        padding: 8px 10px;
        font-size: 0.75rem;
        min-width: 60px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.calculator-body {
    animation: fadeIn 0.3s ease;
}

.history-item {
    animation: slideIn 0.3s ease;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-hover);
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: white;
}

/* User Button */
.user-btn, .share-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-btn:hover, .share-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.user-btn.logged-in {
    background: var(--success-color);
    color: white;
    border-color: transparent;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    width: 100%;
    max-width: 450px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.2rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-header h2 i {
    color: var(--primary-color);
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.3s ease;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.close-modal:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.modal-body {
    padding: 24px;
}

/* Auth Tabs */
.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
}

.auth-tab {
    flex: 1;
    padding: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auth-tab:hover {
    background: var(--bg-tertiary);
}

.auth-tab.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

.form-group small {
    display: block;
    margin-top: 6px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
}

.auth-submit-btn {
    width: 100%;
    padding: 14px;
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.auth-submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.auth-submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Profile Modal */
.profile-modal {
    max-width: 500px;
}

.profile-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.profile-info h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.stat-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-value {
    display: block;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.profile-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.profile-action-btn {
    padding: 14px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-action-btn:hover {
    background: var(--bg-tertiary);
    transform: translateX(5px);
}

.profile-action-btn.danger {
    color: var(--danger-color);
    border-color: var(--danger-color);
}

.profile-action-btn.danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Save/Share Preview */
.save-preview,
.share-preview {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
    text-align: center;
}

.save-preview span,
.share-expression {
    display: block;
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 8px;
}

.share-result {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.share-options {
    margin-bottom: 20px;
}

.share-link-container {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.share-link-container input {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.copy-btn {
    padding: 12px 16px;
    background: var(--primary-color);
    border: none;
    border-radius: 10px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-hover);
}

/* Formula Modal */
.formula-modal {
    max-width: 550px;
}

.formula-variables {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 10px;
}

.variable-input {
    display: flex;
    gap: 10px;
}

.variable-input input {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.remove-var-btn {
    padding: 10px 12px;
    background: rgba(239, 68, 68, 0.2);
    border: none;
    border-radius: 8px;
    color: var(--danger-color);
    cursor: pointer;
    transition: all 0.3s ease;
}

.remove-var-btn:hover {
    background: var(--danger-color);
    color: white;
}

.add-var-btn {
    padding: 10px 16px;
    background: rgba(16, 185, 129, 0.2);
    border: 1px dashed var(--success-color);
    border-radius: 8px;
    color: var(--success-color);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.add-var-btn:hover {
    background: rgba(16, 185, 129, 0.3);
}

/* Formulas List Modal */
.formulas-list-modal {
    max-width: 600px;
}

.formulas-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.formula-tab {
    flex: 1;
    padding: 12px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.formula-tab.active {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
}

.formulas-list,
.saved-list {
    max-height: 400px;
    overflow-y: auto;
}

.formula-item,
.saved-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.formula-item:hover,
.saved-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

.formula-item-header,
.saved-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 10px;
}

.formula-item-name,
.saved-item-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.formula-item-category {
    font-size: 0.75rem;
    padding: 4px 10px;
    background: var(--primary-color);
    color: white;
    border-radius: 20px;
}

.formula-item-expression {
    font-family: 'Orbitron', monospace;
    color: var(--accent-color);
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.formula-item-description,
.saved-item-description {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.formula-item-actions,
.saved-item-actions {
    display: flex;
    gap: 10px;
}

.formula-action-btn,
.saved-action-btn {
    padding: 8px 14px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.formula-action-btn:hover,
.saved-action-btn:hover {
    background: var(--primary-color);
    color: white;
}

.formula-action-btn.delete,
.saved-action-btn.delete {
    color: var(--danger-color);
}

.formula-action-btn.delete:hover,
.saved-action-btn.delete:hover {
    background: var(--danger-color);
    color: white;
}

.no-items {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 20px;
}

.create-formula-btn {
    width: 100%;
    padding: 14px;
    background: var(--gradient-2);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.create-formula-btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

/* Save to Favorites Button */
.save-favorite-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.save-favorite-btn:hover {
    color: var(--warning-color);
    transform: scale(1.2);
}

.save-favorite-btn.saved {
    color: var(--warning-color);
}

/* Responsive Modal */
@media (max-width: 480px) {
    .modal-content {
        max-width: 100%;
        margin: 10px;
        border-radius: 16px;
    }
    
    .profile-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .stat-card {
        padding: 12px;
    }
    
    .stat-value {
        font-size: 1.2rem;
    }
}