/**
 * style.css — Give Me Prompts v2.0
 * macOS High-Brightness Design System + SEO Landing Page
 * Inspired by Apple HIG — clean, luminous, spacious
 */

/* ===== Google Fonts ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ===== Design Tokens ===== */
:root {
    /* — Colors (macOS Light) — */
    --color-primary: #007AFF;
    --color-primary-hover: #005ECB;
    --color-primary-light: rgba(0, 122, 255, 0.08);
    --color-success: #34C759;
    --color-success-hover: #28A745;
    --color-danger: #FF3B30;
    --color-warning: #FF9500;
    --color-accent: #5856D6;
    --color-accent-2: #AF52DE;

    /* — Surfaces — */
    --bg-page: #F2F2F7;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FAFAFA;
    --bg-input: #FFFFFF;
    --bg-section: #F9F9FB;
    --bg-header: rgba(255, 255, 255, 0.82);
    --bg-output: #1C1C1E;

    /* — Borders — */
    --border-color: rgba(0, 0, 0, 0.06);
    --border-input: rgba(0, 0, 0, 0.10);
    --border-focus: var(--color-primary);

    /* — Text — */
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #AEAEB2;
    --text-on-primary: #FFFFFF;
    --text-output: #E5E5EA;

    /* — Shadows — */
    --shadow-xs: 0 0.5px 1px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 0.5px 1px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 12px 40px rgba(0, 0, 0, 0.10), 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-focus: 0 0 0 3.5px rgba(0, 122, 255, 0.25);

    /* — Radii — */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 28px;

    /* — Spacing — */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --space-4xl: 96px;

    /* — Transitions — */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-spring: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* — Layout — */
    --max-width: 1120px;
    --header-height: 56px;
}

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

/* ===== Base ===== */
html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-page);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.gmp-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-header);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 0.5px solid var(--border-color);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
}

.gmp-header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.gmp-header__brand-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.gmp-header__logo {
    height: 36px;
    width: auto;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-normal);
}

.gmp-header__logo:hover {
    transform: scale(1.05);
}

.gmp-header__title {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.gmp-header__title h1 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.gmp-header__title small {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.gmp-header__nav {
    display: flex;
    align-items: center;
}

.gmp-header__lang {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.gmp-header__lang-icon {
    font-size: 1.1rem;
    line-height: 1;
}

.gmp-header__lang select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--bg-section);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-sm);
    padding: 6px 28px 6px 10px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='%2386868B'%3E%3Cpath d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.gmp-header__lang select:focus {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-focus);
}

/* ===================================================================
   HERO SECTION
   =================================================================== */
.gmp-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #4facfe 75%, #00f2fe 100%);
    background-size: 400% 400%;
    animation: heroGradient 12s ease infinite;
    position: relative;
    overflow: hidden;
    padding: var(--space-4xl) var(--space-lg);
}

.gmp-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(1px);
}

.gmp-hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
    border-radius: 50%;
    animation: heroGlow 6s ease-in-out infinite alternate;
}

@keyframes heroGradient {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes heroGlow {
    from { transform: scale(1) translate(0, 0); opacity: 0.5; }
    to   { transform: scale(1.3) translate(-30px, 30px); opacity: 0.8; }
}

.gmp-hero__content {
    position: relative;
    z-index: 2;
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.gmp-hero__badges {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.gmp-hero__badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: #FFFFFF;
    letter-spacing: 0.02em;
    animation: fadeInUp 0.6s ease both;
}

.gmp-hero__badge:nth-child(2) { animation-delay: 0.1s; }
.gmp-hero__badge:nth-child(3) { animation-delay: 0.2s; }

.gmp-hero__title {
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: 900;
    color: #FFFFFF;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.gmp-hero__subtitle {
    font-size: clamp(0.9rem, 2vw, 1.125rem);
    color: rgba(255, 255, 255, 0.92);
    max-width: 720px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
    text-shadow: 0 1px 8px rgba(0, 0, 0, 0.1);
    animation: fadeInUp 0.6s ease 0.3s both;
}

.gmp-hero__cta {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.gmp-hero__btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px 32px;
    background: #FFFFFF;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1rem;
    border-radius: var(--radius-xl);
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-normal);
}

.gmp-hero__btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.gmp-hero__btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 14px 32px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    color: #FFFFFF;
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-xl);
    border: 1.5px solid rgba(255, 255, 255, 0.35);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.gmp-hero__btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.gmp-hero__stats {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease 0.5s both;
}

.gmp-hero__stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.gmp-hero__stat-number {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 900;
    color: #FFFFFF;
    line-height: 1.1;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
}

.gmp-hero__stat-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-top: 2px;
}

/* ===================================================================
   FEATURES SECTION
   =================================================================== */
.gmp-features {
    padding: var(--space-4xl) var(--space-lg);
    background: var(--bg-card);
}

.gmp-features__container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.gmp-features__title {
    font-size: clamp(1.4rem, 3.5vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.gmp-features__subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.gmp-features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.gmp-feature-card {
    background: var(--bg-section);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-lg);
    border: 1px solid var(--border-color);
    text-align: left;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.gmp-feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gmp-feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.gmp-feature-card:hover::after {
    opacity: 1;
}

.gmp-feature-card__icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary-light), rgba(88, 86, 214, 0.08));
    border-radius: var(--radius-md);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gmp-feature-card__title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.gmp-feature-card__desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================================================================
   HOW-TO SECTION
   =================================================================== */
.gmp-howto {
    padding: var(--space-4xl) var(--space-lg);
    background: var(--bg-page);
}

.gmp-howto__container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.gmp-howto__title {
    font-size: clamp(1.4rem, 3.5vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

.gmp-howto__subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.gmp-howto__steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-lg);
}

.gmp-howto__step {
    flex: 1;
    max-width: 320px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl) var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
}

.gmp-howto__step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.gmp-howto__step-number {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: #FFFFFF;
    font-size: 1.25rem;
    font-weight: 800;
    border-radius: 50%;
    box-shadow: 0 4px 14px rgba(0, 122, 255, 0.25);
}

.gmp-howto__step-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.gmp-howto__step-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.gmp-howto__step-arrow {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    color: var(--text-tertiary);
    margin-top: var(--space-3xl);
    font-weight: 300;
}

/* ===================================================================
   FAQ SECTION
   =================================================================== */
.gmp-faq {
    padding: var(--space-4xl) var(--space-lg);
    background: var(--bg-card);
}

.gmp-faq__container {
    max-width: 780px;
    margin: 0 auto;
}

.gmp-faq__title {
    font-size: clamp(1.4rem, 3.5vw, 2rem);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-xl);
    text-align: center;
    letter-spacing: -0.02em;
}

.gmp-faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.gmp-faq__item {
    background: var(--bg-section);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.gmp-faq__item[open] {
    box-shadow: var(--shadow-sm);
    border-color: rgba(0, 122, 255, 0.15);
}

.gmp-faq__question {
    padding: var(--space-md) var(--space-lg);
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    list-style: none;
    transition: color var(--transition-fast);
    user-select: none;
}

.gmp-faq__question::-webkit-details-marker {
    display: none;
}

.gmp-faq__question::before {
    content: '▸';
    font-size: 0.75rem;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.gmp-faq__item[open] .gmp-faq__question::before {
    transform: rotate(90deg);
}

.gmp-faq__question:hover {
    color: var(--color-primary);
}

.gmp-faq__answer {
    padding: 0 var(--space-lg) var(--space-lg) calc(var(--space-lg) + 20px);
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.gmp-footer {
    background: var(--text-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-2xl) var(--space-lg);
    margin-top: auto;
}

.gmp-footer__container {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
}

.gmp-footer__brand {
    font-size: 0.9375rem;
}

.gmp-footer__brand strong {
    color: #FFFFFF;
    font-weight: 700;
}

.gmp-footer__links {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
    justify-content: center;
}

.gmp-footer__links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.gmp-footer__links a:hover {
    color: #FFFFFF;
}

.gmp-footer__copy {
    font-size: 0.75rem;
    line-height: 1.6;
}

.gmp-footer__seo-text {
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.6875rem;
    margin-top: var(--space-xs);
}

/* ===== Toolbar ===== */
.gmp-toolbar {
    background: var(--bg-card);
    margin: var(--space-lg) auto 0;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    max-width: var(--max-width);
    width: calc(100% - var(--space-xl) * 2);
    display: grid;
    grid-template-columns: 100px 1fr 1fr 1fr auto;
    gap: var(--space-md);
    align-items: end;
    box-shadow: var(--shadow-sm);
    border: 0.5px solid var(--border-color);
}

.gmp-toolbar__group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.gmp-toolbar__label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ===== Form Controls ===== */
select,
input[type="text"],
input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    color: var(--text-primary);
    background: var(--bg-input);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    min-height: 40px;
}

select:focus,
input[type="text"]:focus,
input[type="number"]:focus {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-focus);
}

select {
    appearance: none;
    -webkit-appearance: none;
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='%2386868B'%3E%3Cpath d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 30px;
}

input[type="number"] {
    -moz-appearance: textfield;
}
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ===== Generate Button ===== */
.gmp-btn-generate {
    background: var(--color-primary);
    color: var(--text-on-primary);
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 24px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    min-height: 40px;
    white-space: nowrap;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 1px 3px rgba(0, 122, 255, 0.2);
}

.gmp-btn-generate:hover {
    background: var(--color-primary-hover);
    box-shadow: 0 3px 10px rgba(0, 122, 255, 0.25);
}

.gmp-btn-generate:active {
    transform: scale(0.97);
}

/* ===== Main Content ===== */
.gmp-main {
    flex-grow: 1;
    padding: var(--space-lg);
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* ===== Card ===== */
.gmp-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 0.5px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.gmp-card__header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 0.5px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.gmp-card__header h2 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.gmp-card__body {
    padding: var(--space-lg);
}

/* ===== Checkbox Grid ===== */
.gmp-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: var(--space-sm);
}

.gmp-checkbox-grid label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: background var(--transition-fast);
    user-select: none;
}

.gmp-checkbox-grid label:hover {
    background: var(--color-primary-light);
}

.gmp-checkbox-grid input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
    flex-shrink: 0;
}

/* ===== Select Grid ===== */
.gmp-select-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-md);
}

.gmp-select-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.gmp-select-group__label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ===== Output Area ===== */
.gmp-output {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.gmp-output__textarea {
    min-height: 220px;
    width: 100%;
    padding: var(--space-lg);
    background: var(--bg-output);
    color: var(--text-output);
    border: none;
    border-radius: var(--radius-md);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.8125rem;
    line-height: 1.8;
    resize: vertical;
    outline: none;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: box-shadow var(--transition-fast);
}

.gmp-output__textarea:focus {
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3), var(--shadow-focus);
}

.gmp-output__textarea::placeholder {
    color: rgba(255, 255, 255, 0.3);
}

/* ===== Button Row ===== */
.gmp-btn-row {
    display: flex;
    gap: var(--space-sm);
    justify-content: flex-end;
    align-items: center;
}

.gmp-btn {
    border: none;
    border-radius: var(--radius-sm);
    padding: 9px 18px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    transition: all var(--transition-fast);
    min-height: 36px;
}

.gmp-btn:active {
    transform: scale(0.97);
}

.gmp-btn--copy {
    background: var(--bg-section);
    color: var(--color-primary);
    border: 1px solid var(--border-input);
}

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

.gmp-btn--download {
    background: var(--color-primary);
    color: var(--text-on-primary);
    box-shadow: 0 1px 3px rgba(0, 122, 255, 0.15);
}

.gmp-btn--download:hover {
    background: var(--color-primary-hover);
}

.gmp-btn--download:disabled {
    background: var(--bg-section);
    color: var(--text-tertiary);
    cursor: not-allowed;
    box-shadow: none;
    border: 1px solid var(--border-color);
}

/* ===== Status Message ===== */
.gmp-status {
    font-size: 0.8125rem;
    font-weight: 500;
    min-height: 1.25rem;
    text-align: right;
    transition: color var(--transition-fast);
}

.gmp-status--success { color: var(--color-success); }
.gmp-status--error { color: var(--color-danger); }

/* ===== Loading / Error ===== */
.gmp-loading {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    font-size: 0.875rem;
    background: rgba(52, 199, 89, 0.08);
    color: var(--color-success);
    border: 1px solid rgba(52, 199, 89, 0.15);
    display: none;
}

.gmp-error {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 600;
    font-size: 0.875rem;
    background: rgba(255, 59, 48, 0.06);
    color: var(--color-danger);
    border: 1px solid rgba(255, 59, 48, 0.12);
    display: none;
}

/* ===================================================================
   RESPONSIVE — Tablet (<=768px)
   =================================================================== */
@media (max-width: 768px) {
    :root {
        --header-height: 52px;
    }

    .gmp-header {
        padding: 0 var(--space-md);
    }

    .gmp-header__title small {
        display: none;
    }

    /* Hero */
    .gmp-hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .gmp-hero__stats {
        gap: var(--space-lg);
    }

    /* Features */
    .gmp-features {
        padding: var(--space-2xl) var(--space-md);
    }

    .gmp-features__grid {
        grid-template-columns: 1fr 1fr;
    }

    /* How-to */
    .gmp-howto {
        padding: var(--space-2xl) var(--space-md);
    }

    .gmp-howto__steps {
        flex-direction: column;
        align-items: center;
    }

    .gmp-howto__step {
        max-width: 100%;
    }

    .gmp-howto__step-arrow {
        transform: rotate(90deg);
        margin-top: 0;
    }

    /* FAQ */
    .gmp-faq {
        padding: var(--space-2xl) var(--space-md);
    }

    /* Toolbar */
    .gmp-toolbar {
        grid-template-columns: 1fr 1fr;
        width: calc(100% - var(--space-md) * 2);
        margin: var(--space-md) auto 0;
        gap: var(--space-md);
    }

    .gmp-toolbar__group--generate {
        grid-column: 1 / -1;
    }

    .gmp-btn-generate {
        width: 100%;
    }

    .gmp-select-grid {
        grid-template-columns: 1fr 1fr;
    }

    .gmp-checkbox-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    }

    .gmp-btn-row {
        flex-direction: column;
    }

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

    .gmp-card__body {
        padding: var(--space-md);
    }
}

/* ===================================================================
   RESPONSIVE — Phone (<=480px)
   =================================================================== */
@media (max-width: 480px) {
    .gmp-header__logo {
        height: 28px;
    }

    .gmp-header__title h1 {
        font-size: 0.9375rem;
    }

    /* Hero */
    .gmp-hero {
        padding: var(--space-xl) var(--space-md);
    }

    .gmp-hero__badges {
        gap: var(--space-xs);
    }

    .gmp-hero__badge {
        font-size: 0.75rem;
        padding: 4px 10px;
    }

    .gmp-hero__cta {
        flex-direction: column;
    }

    .gmp-hero__btn-primary,
    .gmp-hero__btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .gmp-hero__stats {
        gap: var(--space-md);
    }

    .gmp-hero__stat-number {
        font-size: 1.25rem;
    }

    /* Features */
    .gmp-features__grid {
        grid-template-columns: 1fr;
    }

    /* Toolbar */
    .gmp-toolbar {
        grid-template-columns: 1fr;
        padding: var(--space-md);
    }

    .gmp-select-grid {
        grid-template-columns: 1fr;
    }

    .gmp-checkbox-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }

    .gmp-checkbox-grid label {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.75rem;
    }

    select,
    input[type="text"],
    input[type="number"] {
        min-height: 44px;
        font-size: 1rem; /* prevent iOS zoom */
    }

    .gmp-output__textarea {
        min-height: 180px;
        font-size: 0.75rem;
    }

    .gmp-main {
        padding: var(--space-md);
        gap: var(--space-md);
    }

    /* Footer */
    .gmp-footer__links {
        gap: var(--space-md);
    }
}

/* ===== Scrollbar (Webkit) ===== */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.12);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.2);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.gmp-card {
    animation: fadeIn 0.4s ease both;
}

.gmp-card:nth-child(2) {
    animation-delay: 0.08s;
}

.gmp-card:nth-child(3) {
    animation-delay: 0.16s;
}

/* ===== Scroll-triggered animations ===== */
.gmp-feature-card,
.gmp-howto__step,
.gmp-faq__item {
    animation: fadeInUp 0.5s ease both;
}

.gmp-feature-card:nth-child(1) { animation-delay: 0.05s; }
.gmp-feature-card:nth-child(2) { animation-delay: 0.10s; }
.gmp-feature-card:nth-child(3) { animation-delay: 0.15s; }
.gmp-feature-card:nth-child(4) { animation-delay: 0.20s; }
.gmp-feature-card:nth-child(5) { animation-delay: 0.25s; }
.gmp-feature-card:nth-child(6) { animation-delay: 0.30s; }

.gmp-howto__step:nth-child(1) { animation-delay: 0.1s; }
.gmp-howto__step:nth-child(3) { animation-delay: 0.2s; }
.gmp-howto__step:nth-child(5) { animation-delay: 0.3s; }