/* ===========================
   Keyword Master — Style System
   Glassmorphism Dark Theme
   =========================== */

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

:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #0f0f2e;
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-bg-hover: rgba(255, 255, 255, 0.07);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-hover: rgba(255, 255, 255, 0.15);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);

    --text-primary: #f0f0ff;
    --text-secondary: rgba(240, 240, 255, 0.6);
    --text-muted: rgba(240, 240, 255, 0.35);

    --accent-1: #8b5cf6;
    --accent-2: #6366f1;
    --accent-3: #a78bfa;
    --accent-gradient: linear-gradient(135deg, #8b5cf6, #6366f1, #818cf8);
    --accent-glow: rgba(139, 92, 246, 0.3);

    --success: #34d399;
    --error: #f87171;
    --warning: #fbbf24;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    color: var(--accent-3);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-1);
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Glass Card --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    border-color: var(--glass-border-hover);
}

/* --- Gradient Text --- */
.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(139, 92, 246, 0.5);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background: var(--glass-bg);
    color: var(--text-primary);
    border-color: var(--glass-border-hover);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* --- Section Shared --- */
.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(139, 92, 246, 0.12);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-3);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 580px;
    margin: 0 auto;
}

/* --- Animations --- */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* stagger children */
.features-grid .animate-in:nth-child(2) {
    transition-delay: 0.1s;
}

.features-grid .animate-in:nth-child(3) {
    transition-delay: 0.2s;
}

.steps-grid .animate-in:nth-child(2) {
    transition-delay: 0.08s;
}

.steps-grid .animate-in:nth-child(3) {
    transition-delay: 0.16s;
}

.steps-grid .animate-in:nth-child(4) {
    transition-delay: 0.24s;
}

.steps-grid .animate-in:nth-child(5) {
    transition-delay: 0.32s;
}

/* ===============
   NAVBAR
   =============== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.logo-icon {
    font-size: 1.4rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-cta {
    padding: 8px 20px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    color: #fff !important;
    font-weight: 600;
}

.nav-cta:hover {
    box-shadow: 0 4px 20px var(--accent-glow);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ===============
   HERO
   =============== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
}

.hero-bg-orbs {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.3), transparent 70%);
    top: -150px;
    right: -100px;
    animation: orbFloat1 15s ease-in-out infinite;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: orbFloat2 18s ease-in-out infinite;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(167, 139, 250, 0.2), transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: orbFloat3 12s ease-in-out infinite;
}

@keyframes orbFloat1 {

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

    50% {
        transform: translate(-40px, 30px) scale(1.1);
    }
}

@keyframes orbFloat2 {

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

    50% {
        transform: translate(30px, -40px) scale(1.05);
    }
}

@keyframes orbFloat3 {

    0%,
    100% {
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        transform: translate(-50%, -55%) scale(1.15);
    }
}

.hero-content {
    text-align: center;
    max-width: 740px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-3);
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}

.hero h1 {
    font-size: clamp(2.2rem, 5.5vw, 3.6rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--glass-border);
}

/* ===============
   FEATURES
   =============== */
.features {
    padding: 100px 0;
    position: relative;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 36px 28px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-1), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.15);
    border-radius: var(--radius-md);
    margin: 0 auto 20px;
    color: var(--accent-3);
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
    background: rgba(139, 92, 246, 0.18);
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.15);
}

.feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.65;
}

/* ===============
   HOW IT WORKS
   =============== */
.how-it-works {
    padding: 100px 0;
}

.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.step-card {
    padding: 36px 28px;
    text-align: center;
    flex: 1;
    min-width: 240px;
    max-width: 300px;
    position: relative;
}

.step-number {
    font-size: 3rem;
    font-weight: 900;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 16px;
}

.step-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.step-connector {
    color: var(--text-muted);
    flex-shrink: 0;
}

/* ===============
   TOOL SECTION
   =============== */
.tool-section {
    padding: 100px 0 120px;
    position: relative;
}

/* API Key */
.api-key-wrapper {
    padding: 28px 32px;
    margin-bottom: 24px;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.input-label svg {
    color: var(--accent-3);
}

.api-key-input-group {
    display: flex;
    gap: 8px;
}

.api-key-input-group input {
    flex: 1;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
}

.api-key-input-group input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.api-key-input-group input::placeholder {
    color: var(--text-muted);
}

.btn-toggle-key {
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.btn-toggle-key:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
}

.api-key-hint {
    margin-top: 10px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.api-key-hint a {
    color: var(--accent-3);
    font-weight: 500;
}

/* Test Key Button */
.btn-test-key {
    padding: 12px 20px;
    background: var(--accent-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: #fff;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-test-key:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 25px rgba(139, 92, 246, 0.45);
}

.btn-test-key:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-test-key .btn-loader {
    display: inline-flex;
    align-items: center;
}

.btn-test-key .spinner {
    width: 14px;
    height: 14px;
}

/* API Key Status */
.api-key-status {
    margin-top: 10px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeIn 0.3s ease;
}

.api-key-status.success {
    background: rgba(52, 211, 153, 0.08);
    border: 1px solid rgba(52, 211, 153, 0.2);
    color: var(--success);
}

.api-key-status.error {
    background: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.2);
    color: var(--error);
}

.api-key-status.testing {
    background: rgba(139, 92, 246, 0.08);
    border: 1px solid rgba(139, 92, 246, 0.2);
    color: var(--accent-3);
}

/* Model Selector */
.model-selector-group {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--glass-border);
}

.model-selector-group select {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23a78bfa' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 44px;
}

.model-selector-group select:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.model-selector-group select option {
    background: #1a1a3e;
    color: var(--text-primary);
    padding: 10px;
}

/* Tab Switcher */
.tool-tabs {
    padding: 0;
    margin-bottom: 24px;
    overflow: hidden;
}

.tab-switcher {
    display: flex;
    position: relative;
    border-bottom: 1px solid var(--glass-border);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 18px 24px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.92rem;
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
    position: relative;
    z-index: 1;
}

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

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

.tab-btn svg {
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.tab-btn.active svg {
    opacity: 1;
    color: var(--accent-3);
}

.tab-indicator {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 50%;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px 2px 0 0;
    transition: transform var(--transition-normal);
}

.tab-indicator.right {
    transform: translateX(100%);
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 32px;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

/* Form */
.tool-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.form-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.form-group label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.btn-submit {
    align-self: flex-start;
    padding: 14px 36px;
}

.btn-submit .btn-loader {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===============
   RESULTS
   =============== */
.results-wrapper {
    margin-top: 32px;
    animation: fadeIn 0.5s ease;
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.results-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.results-content {
    padding: 32px;
    overflow-x: auto;
}

.results-content h1,
.results-content h2,
.results-content h3,
.results-content h4 {
    font-weight: 700;
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.results-content h1 {
    font-size: 1.4rem;
}

.results-content h2 {
    font-size: 1.2rem;
    color: var(--accent-3);
}

.results-content h3 {
    font-size: 1.05rem;
}

.results-content h4 {
    font-size: 0.95rem;
}

.results-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.results-content ul,
.results-content ol {
    padding-left: 24px;
    margin-bottom: 12px;
}

.results-content li {
    color: var(--text-secondary);
    margin-bottom: 6px;
    line-height: 1.6;
}

.results-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.results-content em {
    color: var(--accent-3);
    font-style: italic;
}

/* Result Tables */
.results-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.88rem;
}

.results-content thead {
    background: rgba(139, 92, 246, 0.1);
}

.results-content th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--accent-3);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--glass-border);
}

.results-content td {
    padding: 10px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
}

.results-content tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.results-content code {
    padding: 2px 8px;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 4px;
    font-size: 0.88rem;
    color: var(--accent-3);
}

.results-content blockquote {
    border-left: 3px solid var(--accent-1);
    padding: 12px 20px;
    margin: 16px 0;
    background: rgba(139, 92, 246, 0.05);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.results-content hr {
    border: none;
    height: 1px;
    background: var(--glass-border);
    margin: 24px 0;
}

/* Error State */
.error-message {
    padding: 16px 20px;
    background: rgba(248, 113, 113, 0.08);
    border: 1px solid rgba(248, 113, 113, 0.2);
    border-radius: var(--radius-md);
    color: var(--error);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ===============
   FOOTER
   =============== */
.footer {
    padding: 60px 0 40px;
    border-top: 1px solid var(--glass-border);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

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

/* ===============
   RESPONSIVE
   =============== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 130px 0 70px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .steps-grid {
        flex-direction: column;
    }

    .step-connector {
        transform: rotate(90deg);
    }

    .step-card {
        max-width: 100%;
    }

    .form-grid,
    .form-grid-2 {
        grid-template-columns: 1fr;
    }

    .tab-btn {
        font-size: 0.82rem;
        padding: 14px 16px;
    }

    .tab-content {
        padding: 24px 20px;
    }

    .api-key-wrapper {
        padding: 20px;
    }

    .results-content {
        padding: 20px;
    }

    .hero-stats {
        gap: 20px;
    }

    .btn-submit {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.7rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .section-header h2 {
        font-size: 1.5rem;
    }
}