/* === CSS VARIABLES (DARK - default) === */
:root {
    --bg: #0f1a0f;
    --bg-secondary: #162016;
    --card-bg: #1a2e1a;
    --card-bg-hover: #1f351f;
    --card-border: rgba(76, 175, 80, 0.1);
    --text: #e0e8e0;
    --text-secondary: #a0b0a0;
    --text-muted: #6b7f6b;
    --primary: #4caf50;
    --primary-dark: #2e7d32;
    --primary-darker: #1b5e20;
    --primary-light: #81c784;
    --primary-glow: rgba(76, 175, 80, 0.15);
    --primary-glow-strong: rgba(76, 175, 80, 0.3);
    --input-bg: #122012;
    --input-border: #2a3d2a;
    --input-focus-border: #4caf50;
    --input-focus-shadow: rgba(76, 175, 80, 0.15);
    --error-bg: #2d1515;
    --error-border: #5c2020;
    --error-text: #ef5350;
    --valid-bg: #1b3a1b;
    --valid-text: #66bb6a;
    --invalid-bg: #3a1b1b;
    --invalid-text: #ef5350;
    --autocomplete-bg: #1a2e1a;
    --autocomplete-hover: #254025;
    --gradient-start: #0d1f0d;
    --gradient-mid: #162016;
    --gradient-end: #1b3a1b;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-light: rgba(0, 0, 0, 0.15);
}

/* === LIGHT THEME === */
[data-theme="light"] {
    --bg: #f0f5f0;
    --bg-secondary: #e8f0e8;
    --card-bg: #ffffff;
    --card-bg-hover: #ffffff;
    --card-border: rgba(46, 125, 50, 0.08);
    --text: #1a2e1a;
    --text-secondary: #4a5f4a;
    --text-muted: #8a9f8a;
    --primary: #2e7d32;
    --primary-dark: #1b5e20;
    --primary-darker: #145214;
    --primary-light: #43a047;
    --primary-glow: rgba(46, 125, 50, 0.08);
    --primary-glow-strong: rgba(46, 125, 50, 0.15);
    --input-bg: #f8fbf8;
    --input-border: #d0ddd0;
    --input-focus-border: #2e7d32;
    --input-focus-shadow: rgba(46, 125, 50, 0.12);
    --error-bg: #fef3f3;
    --error-border: #f5c6c6;
    --error-text: #c62828;
    --valid-bg: #e8f5e9;
    --valid-text: #2e7d32;
    --invalid-bg: #ffebee;
    --invalid-text: #c62828;
    --autocomplete-bg: #ffffff;
    --autocomplete-hover: #e8f5e9;
    --gradient-start: #1b5e20;
    --gradient-mid: #2e7d32;
    --gradient-end: #43a047;
    --shadow: rgba(0, 0, 0, 0.08);
    --shadow-light: rgba(0, 0, 0, 0.04);
}

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

html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-user-select: none;
    -moz-user-select: none;
    user-select: none;
    transition: background 0.3s ease, color 0.3s ease;
}

/* === HEADER === */
.header {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid), var(--gradient-end));
    color: #fff;
    padding: 1.75rem 1rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 60%);
    animation: headerPulse 8s ease-in-out infinite;
}

@keyframes headerPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.header p {
    font-size: 1rem;
    opacity: 0.8;
    margin-top: 0.4rem;
    font-weight: 300;
    position: relative;
    z-index: 1;
}

/* === THEME TOGGLE === */
.theme-toggle {
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #fff;
    transition: all 0.2s;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: rgba(255,255,255,0.25);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

[data-theme="dark"] .icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: block; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* === CONTAINER === */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

/* === TABS === */
.tabs {
    display: flex;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 4px;
    box-shadow: 0 1px 3px var(--shadow);
    margin-bottom: 1.5rem;
    border: 1px solid var(--card-border);
}

.tab-btn {
    flex: 1;
    padding: 0.75rem;
    border: none;
    background: transparent;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px var(--primary-glow-strong);
}

.tab-btn:not(.active):hover {
    background: var(--primary-glow);
    color: var(--primary-light);
}

/* === CARDS === */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px var(--shadow-light), 0 4px 12px var(--shadow-light);
    margin-bottom: 1.5rem;
    transition: all 0.3s ease;
    border: 1px solid var(--card-border);
}

.card:hover {
    box-shadow: 0 2px 6px var(--shadow), 0 8px 24px var(--shadow-light);
}

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title svg { width: 20px; height: 20px; }

.result-card-inner {
    margin-bottom: 0;
    box-shadow: none;
    border: 2px solid var(--primary-glow-strong);
}

/* === FORM ELEMENTS === */
.form-group { margin-bottom: 1rem; }

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.4rem;
}

.form-input, .form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--input-border);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text);
    background: var(--input-bg);
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
    -webkit-user-select: text;
    user-select: text;
}

.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px var(--input-focus-shadow);
}

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

.form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%234caf50' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

/* === AUTOCOMPLETE === */
.autocomplete-wrapper { position: relative; }

.autocomplete-list {
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--autocomplete-bg);
    border: 2px solid var(--input-border);
    border-top: none;
    border-radius: 0 0 10px 10px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    display: none;
    box-shadow: 0 8px 24px var(--shadow);
}

.autocomplete-list.show { display: block; }

.autocomplete-item {
    padding: 0.65rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.15s;
    color: var(--text);
}

.autocomplete-item:hover, .autocomplete-item.highlighted {
    background: var(--autocomplete-hover);
}

.autocomplete-item .prov { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }

/* === BUTTONS === */
.btn {
    width: 100%;
    padding: 0.9rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-darker), var(--primary));
    color: #fff;
    box-shadow: 0 4px 12px var(--primary-glow-strong);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px var(--primary-glow-strong);
    transform: translateY(-1px);
}

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

.btn-secondary {
    background: var(--primary-glow);
    color: var(--primary-light);
    margin-top: 0.75rem;
}

.btn-secondary:hover { background: var(--primary-glow-strong); }

/* === RESULT === */
.result-box {
    display: none;
    margin-top: 1.5rem;
    animation: slideUp 0.4s ease;
}

.result-box.show { display: block; }

@keyframes slideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-cf {
    background: linear-gradient(135deg, var(--primary-darker), var(--primary-dark));
    color: #fff;
    text-align: center;
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.result-cf-code {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 3px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    word-break: break-all;
    -webkit-user-select: text;
    user-select: text;
}

.result-cf-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.7;
    margin-bottom: 0.5rem;
}

.result-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.btn-action {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.25rem;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    color: #fff;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-action:hover { background: rgba(255,255,255,0.25); }
.btn-action svg { width: 14px; height: 14px; }

/* === RESULT DETAILS === */
.result-details { display: grid; gap: 0.75rem; }

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--primary-glow);
    border-radius: 10px;
}

.detail-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.detail-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary-light);
    -webkit-user-select: text;
    user-select: text;
}

.validation-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
}

.validation-badge.valid { background: var(--valid-bg); color: var(--valid-text); }
.validation-badge.invalid { background: var(--invalid-bg); color: var(--invalid-text); }

/* === ERROR === */
.error-msg {
    display: none;
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-top: 1rem;
    animation: slideUp 0.3s ease;
}

.error-msg.show { display: block; }

/* === AD CONTAINERS === */
.ad-container { margin: 1rem 0; text-align: center; min-height: 50px; overflow: hidden; border-radius: 8px; }
.ad-top { margin-bottom: 1.5rem; }
.ad-middle { margin: 1.5rem 0; }
.ad-bottom { margin-top: 0.5rem; margin-bottom: 1rem; }

/* === INFO SECTION === */
.info-section { margin-top: 1rem; }
.info-section .card-title { color: var(--primary-light); }

.info-text { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }
.info-text p { margin-bottom: 0.75rem; }
.info-text strong { color: var(--primary-light); }

.features-list { list-style: none; padding: 0; display: grid; gap: 0.5rem; margin: 1rem 0; }

.features-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.features-list li::before {
    content: '';
    width: 6px; height: 6px; min-width: 6px;
    background: var(--primary);
    border-radius: 50%;
    margin-top: 0.55rem;
}

/* === FAQ === */
.faq-question {
    color: var(--primary-light);
    font-size: 0.95rem;
    font-weight: 700;
    margin: 1rem 0 0.35rem;
}

.faq-question:first-child {
    margin-top: 0;
}

/* === DISCLAIMER === */
.disclaimer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-muted);
    font-size: 0.7rem;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto;
}

/* === TAB PANELS === */
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeIn 0.3s ease; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* === FOOTER === */
.footer { text-align: center; padding: 1.5rem 1rem 0.5rem; font-size: 0.75rem; color: var(--text-muted); }

/* === TOOLTIP === */
.copied-tooltip {
    position: fixed;
    bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--primary-dark);
    color: #fff;
    padding: 0.6rem 1.25rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    z-index: 1000;
}

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

/* === SCROLLBAR === */
.autocomplete-list::-webkit-scrollbar { width: 6px; }
.autocomplete-list::-webkit-scrollbar-track { background: transparent; }
.autocomplete-list::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 3px; }

/* === COOKIE BANNER === */
.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border-top: 1px solid var(--card-border);
    padding: 1rem 1.25rem;
    z-index: 9999;
    box-shadow: 0 -4px 20px var(--shadow);
    transform: translateY(100%);
    transition: transform 0.4s ease;
}

.cookie-banner.show {
    transform: translateY(0);
}

.cookie-content {
    max-width: 640px;
    margin: 0 auto;
}

.cookie-content p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.cookie-link {
    color: var(--primary-light);
    text-decoration: underline;
    font-weight: 600;
}

.cookie-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.btn-cookie {
    padding: 0.55rem 1.25rem;
    border: none;
    border-radius: 8px;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-cookie-accept {
    background: var(--primary);
    color: #fff;
}

.btn-cookie-accept:hover {
    background: var(--primary-dark);
}

.btn-cookie-reject {
    background: var(--primary-glow);
    color: var(--primary-light);
}

.btn-cookie-reject:hover {
    background: var(--primary-glow-strong);
}

/* === RESPONSIVE === */
@media (max-width: 480px) {
    .header { padding: 1.25rem 1rem; }
    .header h1 { font-size: 1.4rem; }
    .header p { font-size: 0.85rem; }
    .container { padding: 1rem 0.75rem 2rem; }
    .card { padding: 1.25rem; border-radius: 12px; }
    .form-row { grid-template-columns: 1fr; }
    .result-cf-code { font-size: 1.35rem; letter-spacing: 2px; }
    .tab-btn { font-size: 0.85rem; padding: 0.65rem; }
    .btn { padding: 0.85rem; font-size: 0.9rem; }
    .theme-toggle { width: 34px; height: 34px; }
    .theme-toggle svg { width: 16px; height: 16px; }
}

@media (min-width: 481px) and (max-width: 768px) {
    .container { padding: 1.25rem 1rem 2.5rem; }
    .result-cf-code { font-size: 1.6rem; }
}