/* ===== CSS Reset & Variables ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-hue: 250;
    --primary: hsl(var(--primary-hue), 100%, 67%);
    --primary-light: hsl(var(--primary-hue), 100%, 75%);
    --primary-dark: hsl(var(--primary-hue), 100%, 55%);

    --accent-hue: 170;
    --accent: hsl(var(--accent-hue), 100%, 50%);
    --accent-light: hsl(var(--accent-hue), 100%, 60%);

    --success: hsl(145, 80%, 50%);
    --warning: hsl(45, 100%, 50%);
    --danger: hsl(0, 85%, 60%);

    /* Background */
    --bg-primary: hsl(230, 25%, 8%);
    --bg-secondary: hsl(230, 20%, 12%);
    --bg-tertiary: hsl(230, 18%, 16%);

    /* Glass effect */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Text */
    --text-primary: hsl(0, 0%, 95%);
    --text-secondary: hsl(230, 10%, 75%);
    --text-muted: hsl(230, 10%, 60%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Fonts */
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* ===== Base Styles ===== */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Background Effects ===== */
.background-effects {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
    bottom: -100px;
    left: -100px;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent-light) 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
    opacity: 0.2;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(30px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 20px) scale(0.95);
    }

    75% {
        transform: translate(-30px, -20px) scale(1.02);
    }
}

/* ===== Container ===== */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.6s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

.logo-icon svg {
    width: 28px;
    height: 28px;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4);
    }

    50% {
        box-shadow: 0 0 0 15px rgba(124, 58, 237, 0);
    }
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: var(--spacing-xs);
}

/* ===== Glass Card ===== */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    backdrop-filter: blur(20px);
    box-shadow: var(--glass-shadow);
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Section Title ===== */
.section-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.title-icon {
    width: 18px;
    height: 18px;
    color: var(--primary-light);
}

/* ===== Tab Section ===== */
.tab-section {
    margin-bottom: var(--spacing-lg);
}

.tab-group {
    display: flex;
    gap: var(--spacing-sm);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.tab-btn:hover {
    border-color: var(--primary);
    color: var(--text-primary);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

/* ===== Codes Container ===== */
.codes-container {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.codes-container.cols-1 {
    grid-template-columns: 1fr;
}

.codes-container.cols-2,
.codes-container.cols-3,
.codes-container.cols-4 {
    grid-template-columns: 1fr;
}

/* ===== Code Card ===== */
.code-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-number {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.card-header .secret-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: var(--bg-secondary);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.card-header .secret-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.card-header .secret-input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-main);
}

.card-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

.card-btn svg {
    width: 18px;
    height: 18px;
}

/* ===== Code Display ===== */
.code-display {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid transparent;
    transition: all var(--transition-normal);
}

.code-display.active {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(45, 212, 191, 0.15);
}

.code-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.placeholder-icon {
    width: 32px;
    height: 32px;
    opacity: 0.5;
    color: var(--text-muted);
}

.code-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.3rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: codeAppear 0.3s ease-out;
}

@keyframes codeAppear {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== Code Footer ===== */
.code-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.timer-mini {
    position: relative;
    width: 36px;
    height: 36px;
}

.timer-mini svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.timer-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 3;
}

.timer-progress {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 100.53;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke 0.3s ease;
}

.timer-progress.warning {
    stroke: var(--warning);
}

.timer-progress.danger {
    stroke: var(--danger);
}

.timer-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.copy-btn svg {
    width: 14px;
    height: 14px;
}

/* ===== Input Hint ===== */
.input-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
}

.hint-icon {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

/* ===== Footer ===== */
.footer {
    margin-top: auto;
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.footer-icon {
    width: 16px;
    height: 16px;
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 1000;
}

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

.toast.success .toast-icon {
    color: var(--success);
}

.toast.error .toast-icon {
    color: var(--danger);
}

.toast-icon {
    width: 20px;
    height: 20px;
}

.toast-message {
    color: var(--text-primary);
    font-size: 0.95rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }

    .codes-container.cols-2,
    .codes-container.cols-3,
    .codes-container.cols-4 {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .code-value {
        font-size: 1.75rem;
        letter-spacing: 0.2rem;
    }

    .tab-btn {
        padding: var(--spacing-sm);
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .glass-card {
        padding: var(--spacing-md);
    }

    .card-header .secret-input {
        font-size: 0.75rem;
    }

    .code-value {
        font-size: 1.5rem;
    }
}