@import url('https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;600;700&family=Kanit:wght@500&family=Lilita+One&display=swap');

:root {
    --navy: #031638;
    --night: #020b1f;
    --panel: #071b3d;
    --panel-border: #0e2853;
    --aqua: #6fdcff;
    --teal: #3fe6c4;
    --gold: #f7c46c;
    --muted: #8fa4c2;
    --white: #f6fbff;
    --ink: #012640;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    min-height: 100vh;
    font-family: 'Lilita One', 'Baloo 2', 'Kanit', sans-serif;
    background: radial-gradient(circle at 20% 20%, #061840, var(--night));
    color: var(--white);
    display: flex;
    flex-direction: column;
}

.site-header {
    position: sticky;
    top: 0;
    width: 100%;
    background: var(--aqua);
    color: var(--ink);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem clamp(1.5rem, 4vw, 4.5rem);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 700;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 1.3rem;
}

.brand-button {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    padding: 0;
    font: inherit;
}

.brand-button:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 4px;
}

.brand-logo {
    width: 44px;
    height: 44px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
}

.brand-logo i {
    font-size: 1.4rem;
    color: var(--ink);
}

.brand-text {
    font-size: 1.35rem;
    font-weight: 700;
}

.primary-nav {
    display: flex;
    align-items: center;
    gap: 1.75rem;
    font-weight: 700;
}

.primary-nav a,
.dropdown-toggle {
    color: var(--ink);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.primary-nav a:hover,
.primary-nav a:focus,
.dropdown-toggle:hover,
.dropdown-toggle:focus {
    opacity: 0.65;
}

.nav-dropdown {
    position: relative;
}

.dropdown-toggle {
    background: none;
    border: none;
    font: inherit;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    cursor: pointer;
    padding: 0;
}

.dropdown-caret {
    font-size: 0.8em;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 0;
    background: var(--aqua);
    border: 2px solid var(--ink);
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    min-width: 190px;
    padding: 0.25rem;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 20;
}

.nav-dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    background: none;
    border: none;
    padding: 0.6rem 0.9rem;
    border-radius: 8px;
    font: inherit;
    text-align: left;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink);
    cursor: pointer;
}

.dropdown-item:hover,
.dropdown-item:focus-visible {
    background: rgba(1, 38, 64, 0.15);
}

.dropdown-item.is-active {
    background: rgba(1, 38, 64, 0.25);
}

.hero {
    flex: 1;
    width: 100%;
    padding: clamp(2rem, 5vh, 4rem) clamp(1.5rem, 6vw, 6rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(2rem, 4vw, 3.5rem);
    position: relative;
    min-height: calc(100vh - 80px);
}

.clock-stage {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.clock-stage.hidden {
    display: none;
}

.theme-view {
    width: 100%;
    display: none;
    justify-content: center;
    align-items: center;
}

.theme-view.active {
    display: flex;
}

.hero-clock {
    width: min(1024px, 95vw);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: clamp(2rem, 4vw, 5rem);
    flex-wrap: wrap;
    padding-top: 1.5rem;
    text-align: center;
}

.hero-clock .unit {
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.hero-clock .value {
    display: block;
    font-size: clamp(2.8rem, 8vw, 5.5rem);
    font-weight: 700;
    color: var(--gold);
}

.hero-clock .label {
    color: var(--muted);
    font-size: 1rem;
    font-weight: 600;
}

.hero-clock .year .value {
    font-size: clamp(6rem, 24vw, 15rem);
    color: var(--teal);
    line-height: 0.85;
}

.hero-clock .year .label {
    font-size: 1.2rem;
}

.decimal-clock {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.2rem;
    text-transform: uppercase;
}

.decimal-clock .decimal-value {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}

.decimal-clock .value {
    font-size: clamp(3.5rem, 10vw, 6rem);
}

.decimal-clock .year-value {
    color: var(--teal);
    font-size: clamp(4.5rem, 12vw, 8rem);
}

.decimal-clock .fraction {
    font-size: clamp(3rem, 8vw, 4.5rem);
    color: var(--gold);
}

.decimal-labels {
    display: flex;
    justify-content: space-between;
    width: min(320px, 80vw);
    color: var(--muted);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.12em;
}

.flip-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(1rem, 3vw, 2rem);
}

.flip-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
}

.flip-display {
    position: relative;
    min-width: clamp(90px, 18vw, 140px);
    padding: 0.65em 0.5em;
    border-radius: 14px;
    background: #6BD7F5;
    color: #0B1A33;
    font-size: clamp(2.5rem, 8vw, 3.5rem);
    font-weight: 700;
    text-align: center;
    box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.15);
    transform-origin: center;
    backface-visibility: hidden;
    perspective: 800px;
}

.flip-display::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    height: 3px;
    background: #0B1A33;
}

.flip-card[data-flip-unit="year"] .flip-display {
    background: #49C6B3;
}

.flip-display.flip-animate {
    animation: flip-card 0.6s ease-in-out;
}

@keyframes flip-card {
    0% {
        transform: rotateX(0deg);
    }
    45% {
        transform: rotateX(-90deg);
    }
    55% {
        transform: rotateX(90deg);
    }
    100% {
        transform: rotateX(0deg);
    }
}

.control-panel {
    width: min(640px, 95vw);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
}

.panel-header h1 {
    font-size: clamp(1.5rem, 4vw, 2.4rem);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

.panel-header p {
    color: var(--muted);
    text-transform: none;
    font-size: 1rem;
}

.form-fields {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.date-inputs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

select,
input[type="number"],
input[type="time"] {
    width: 100%;
    border-radius: 14px;
    border: 1px solid var(--panel-border);
    background: rgba(4, 18, 43, 0.8);
    color: #9AA8BF;
    padding: 0.85rem 1.1rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    appearance: none;
}

input[type="number"] {
    text-align: center;
}

select:focus,
input:focus {
    outline: 2px solid var(--teal);
    outline-offset: 2px;
}

input::placeholder {
    color: #9AA8BF;
    opacity: 0.95;
}

input[type="time"]::-webkit-calendar-picker-indicator {
    filter: invert(73%) sepia(8%) saturate(403%) hue-rotate(186deg) brightness(92%) contrast(88%);
    opacity: 1;
}

input[type="time"]::-moz-focus-inner {
    color: #9AA8BF;
}


.time-inputs {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    text-align: left;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.time-inputs small {
    text-transform: none;
    font-size: 0.8rem;
    opacity: 0.8;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.btn {
    border: none;
    border-radius: 14px;
    padding: 0.85rem 1.8rem;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn.primary {
    background: var(--teal);
    color: var(--ink);
}

.btn.primary:hover,
.btn.primary:focus-visible {
    transform: translateY(-2px);
}

.btn.ghost {
    background: transparent;
    border: 2px solid var(--muted);
    color: var(--muted);
}

.btn.ghost:hover,
.btn.ghost:focus-visible {
    border-color: var(--white);
    color: var(--white);
}

.hidden {
    display: none !important;
}

body.has-results .theme-date .hero-clock .value {
    text-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
}

body.has-results .control-panel {
    display: none;
}

body.has-results .hero {
    justify-content: center;
}

body.has-results #clock-stage.hidden {
    display: none;
}

body.has-results #clock-stage {
    display: flex;
}

body.has-results .reset-button {
    display: inline-flex !important;
}

.reset-button {
    position: absolute;
    left: clamp(1.5rem, 4vw, 4rem);
    bottom: clamp(1.5rem, 4vw, 4rem);
    letter-spacing: 0.08em;
    border-radius: 8px;
}

@media (max-width: 900px) {
    .hero-clock {
        justify-content: center;
    }
}

@media (max-width: 700px) {
    .site-header {
        flex-direction: column;
        gap: 0.75rem;
        text-align: center;
    }

    .primary-nav {
        gap: 1rem;
    }

    .hero {
        padding-top: 5rem;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }
}