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

:root {
    --bg-primary: #0a0a0a;
    --bg-surface: #121212;
    --bg-elevated: #1c1c1c;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #6b6b6b;
    --accent: #ff6a00;
    --accent-hover: #e05e00;
    --accent-glow: rgba(255, 106, 0, 0.3);
    --border-subtle: #2a2a2a;
    --radius: 12px;
    --radius-sm: 8px;
    --font-sans: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-display: 'Space Grotesk', 'Manrope', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: 0.25s ease;
}

html {
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    padding: 0 20px;
    position: relative;
    line-height: 1.6;
}

/* ===== BACKGROUND DECORATIONS ===== */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 60px 60px;
}

.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
    pointer-events: none;
    z-index: 0;
}

.bg-orb--a {
    width: 500px;
    height: 500px;
    top: -10%;
    right: -5%;
    background: #ff6a00;
}

.bg-orb--b {
    width: 400px;
    height: 400px;
    bottom: -10%;
    left: -5%;
    background: #6a00ff;
    opacity: 0.15;
}

/* ===== UTILITY ===== */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.accent {
    color: var(--accent);
}

/* ===== TOPBAR ===== */
.topbar {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 0 12px;
    border-bottom: 1px solid var(--border-subtle);
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: inherit;
    gap: 8px;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.02em;
    background: linear-gradient(to right, #ffffff, #c0c0c0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-sub {
    font-size: 0.6rem;
    letter-spacing: 0.04em;
    color: var(--text-muted);
    text-transform: uppercase;
    -webkit-text-fill-color: var(--text-muted);
}

.topnav {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-switch select {
    background: var(--bg-surface);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 6px 30px 6px 12px;
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%236b6b6b'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    cursor: pointer;
    transition: var(--transition);
}

.lang-switch select:hover {
    border-color: var(--accent);
}

.iconbtn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.iconbtn:hover {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.iconbtn--accent:hover {
    background: var(--accent-glow);
    color: var(--accent);
}

/* ===== HERO ===== */
.hero {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0 60px;
    position: relative;
    z-index: 2;
}

.hero-inner {
    max-width: 720px;
    width: 100%;
    text-align: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: var(--bg-surface);
    padding: 6px 16px 6px 12px;
    border-radius: 40px;
    border: 1px solid var(--border-subtle);
    margin-bottom: 28px;
}

.eyebrow-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.4;
        transform: scale(0.8);
    }
}

.headline {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2.4rem, 10vw, 4.2rem);
    line-height: 1.08;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.subhead {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto 36px;
    font-weight: 400;
}

/* ===== SEARCH BOX ===== */
.searchbox {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 60px;
    padding: 4px 4px 4px 20px;
    transition: var(--transition);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.searchbox:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-glow), 0 8px 30px rgba(0, 0, 0, 0.5);
}

.searchbox-icon {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.searchbox input {
    flex: 1;
    background: transparent;
    border: none;
    padding: 14px 12px;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-primary);
    outline: none;
    min-width: 0;
    letter-spacing: 0.01em;
}

.searchbox input::placeholder {
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--accent);
    color: #0a0a0a;
    border: none;
    padding: 12px 28px;
    border-radius: 40px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
    box-shadow: 0 0 20px var(--accent-glow);
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-arrow {
    transition: transform 0.3s ease;
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

/* ===== HINT ===== */
.hint {
    margin-top: 18px;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}

.hint-key {
    font-weight: 500;
    color: var(--text-secondary);
}

.hint code {
    font-family: var(--font-mono);
    background: var(--bg-surface);
    padding: 2px 10px;
    border-radius: 4px;
    border: 1px solid var(--border-subtle);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.hint-or {
    color: var(--text-muted);
    opacity: 0.5;
}

.month-unavailable {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 6px;
    letter-spacing: 0.04em;
}

/* ===== RESULT ===== */
.result {
    margin-top: 32px;
    padding: 24px;
    background: var(--bg-surface);
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
    text-align: left;
    min-height: 60px;
    transition: var(--transition);
}

.result:empty {
    display: none;
}

.result-card {
    animation: fadeIn 0.3s ease;
}

.result-loading {
    text-align: center;
    color: var(--text-muted);
}

.result-empty {
    text-align: center;
    padding: 20px 0;
    color: var(--text-muted);
}

.result-error {
    text-align: center;
    color: #ff6a6a;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 16px;
}

.result-label {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.result-value.mono {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--text-primary);
}

.result-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.row-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.row-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.row-value.accent {
    color: var(--accent);
    font-size: 1.2rem;
}

.result-empty code {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    background: var(--bg-elevated);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.btn-cert {
    width: 100%;
    margin-top: 20px;
    padding: 12px;
    background: rgba(255, 106, 0, 0.08);
    border: 1px solid rgba(255, 106, 0, 0.25);
    border-radius: var(--radius-sm);
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-cert:hover {
    background: rgba(255, 106, 0, 0.15);
    border-color: var(--accent);
}

.result-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

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

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

/* ===== FOOTER ===== */
.footer {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 24px 0 20px;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex-wrap: wrap;
}

.footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.dot {
    color: var(--border-subtle);
}

/* ===== MODAL ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: modalFade 0.2s ease;
}

.modal[hidden] {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    cursor: pointer;
}

.modal-panel {
    position: relative;
    z-index: 1;
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    max-width: 520px;
    width: 100%;
    padding: 32px 28px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.8);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-close {
    position: absolute;
    top: 14px;
    right: 18px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.8rem;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

.modal-panel h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.6rem;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

/* ===== FORM ===== */
.form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.field-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.field input,
.field textarea {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--text-primary);
    transition: var(--transition);
    width: 100%;
}

.field input:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

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

.form-row {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.form-status {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex: 1;
    min-width: 100px;
}

.form-status.success {
    color: #4caf50;
}

.form-status.error {
    color: #ff6a6a;
}

.honey {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

@keyframes modalFade {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
    .topbar {
        padding: 12px 0 10px;
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }

    .brand {
        justify-content: center;
    }
    .brand-name {
        font-size: 1.1rem;
    }
    .brand-sub {
        font-size: 0.5rem;
    }

    .topnav {
        justify-content: center;
    }

    .searchbox {
        flex-wrap: wrap;
        border-radius: var(--radius);
        padding: 12px;
        gap: 8px;
        background: var(--bg-surface);
    }

    .searchbox-icon {
        display: none;
    }

    .searchbox input {
        width: 100%;
        padding: 12px 14px;
        font-size: 0.95rem;
        text-align: center;
        background: var(--bg-elevated);
        border-radius: var(--radius-sm);
    }

    .btn-primary {
        width: 100%;
        justify-content: center;
        padding: 14px;
    }

    .hero {
        padding: 24px 0 40px;
    }
    .headline {
        font-size: clamp(2rem, 8vw, 3rem);
    }
    .subhead {
        font-size: 0.95rem;
    }
    .modal-panel {
        padding: 24px 16px;
    }
    .result {
        padding: 16px;
    }
    .result-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .row {
        flex-direction: column;
        align-items: flex-start;
        gap: 2px;
    }
}