/* ─── Fonts ─────────────────────────────────────────────────────────────── */

@font-face {
    font-family: 'Cinzel';
    src: url('../fonts/Cinzel-VariableFont_wght.ttf') format('truetype');
    font-weight: 100 900;
}

@font-face {
    font-family: 'Cinzel Decorative';
    src: url('../fonts/CinzelDecorative-Regular.ttf') format('truetype');
    font-weight: 400;
}

@font-face {
    font-family: 'Cinzel Decorative';
    src: url('../fonts/CinzelDecorative-Bold.ttf') format('truetype');
    font-weight: 700;
}

@font-face {
    font-family: 'Cinzel Decorative';
    src: url('../fonts/CinzelDecorative-Black.ttf') format('truetype');
    font-weight: 900;
}

@font-face {
    font-family: 'Libre Baskerville';
    src: url('../fonts/LibreBaskerville-VariableFont_wght.ttf') format('truetype');
    font-weight: 100 900;
    font-style: normal;
}

@font-face {
    font-family: 'Libre Baskerville';
    src: url('../fonts/LibreBaskerville-Italic-VariableFont_wght.ttf') format('truetype');
    font-weight: 100 900;
    font-style: italic;
}

/* ─── Theme Variables ───────────────────────────────────────────────────── */

:root {
    --bg:          #FFF8EE;
    --text:        #2C1A0E;
    --heading:     #8B3A00;
    --accent:      #D4680A;
    --nav-bg:      #8B3A00;
    --nav-text:    #FFF8EE;
    --footer-bg:   #8B3A00;
    --footer-text: #FFF8EE;
    --border:      rgba(44, 26, 14, 0.2);
    --table-row-bg: #F5EDDF;
    --table-stripe: rgba(212, 104, 10, 0.08);
    --table-diagonal: rgba(212, 104, 10, 0.18);
    --calc-accent: #2A6F77;
    --calc-bg: rgba(42, 111, 119, 0.08);
    --calc-border: rgba(139, 58, 0, 0.35);
    --diagram-orbit:       rgba(44, 26, 14, 0.2);
    --diagram-node-ring:   rgba(100, 50, 130, 0.3);
    --diagram-zodiac-ring: rgba(42, 111, 119, 0.3);
    --diagram-earth-fill:  #2a5a8a;
    --diagram-earth-stroke:#3a6a9a;
    --diagram-rashi:       #7a5000;
    --diagram-nakshatra:   #2A6F77;
    --diagram-moon:        #3a5070;
    --diagram-mercury:     #555555;
    --diagram-venus:       #8a6800;
    --diagram-sun:         #8a4400;
    --diagram-mars:        #b02020;
    --diagram-jupiter:     #7a5800;
    --diagram-saturn:      #5a4830;
}

[data-theme="dark"] {
    --bg:          #1E1E1E;
    --text:        #F5F0E8;
    --heading:     #F0C040;
    --accent:      #F0A020;
    --nav-bg:      #0A0A0A;
    --nav-text:    #F5F0E8;
    --footer-bg:   #0A0A0A;
    --footer-text: #F5F0E8;
    --border:      rgba(245, 240, 232, 0.15);
    --table-row-bg: #2A2A2A;
    --table-stripe: rgba(240, 160, 32, 0.08);
    --table-diagonal: rgba(240, 160, 32, 0.18);
    --calc-accent: #4FB3BF;
    --calc-bg: rgba(79, 179, 191, 0.08);
    --calc-border: rgba(240, 192, 64, 0.35);
    --diagram-orbit:       #2a2a2a;
    --diagram-node-ring:   #3a2a4a;
    --diagram-zodiac-ring: #1a3a3a;
    --diagram-earth-fill:  #1a3a5a;
    --diagram-earth-stroke:#3a6a9a;
    --diagram-rashi:       #c9a84c;
    --diagram-nakshatra:   #5a8a8a;
    --diagram-moon:        #d0d8e8;
    --diagram-mercury:     #bbbbbb;
    --diagram-venus:       #e8d080;
    --diagram-sun:         #f5c842;
    --diagram-mars:        #e05540;
    --diagram-jupiter:     #c8a860;
    --diagram-saturn:      #a09878;
}

/* ─── Reset & Base ──────────────────────────────────────────────────────── */

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Libre Baskerville', serif;
    font-size: 1rem;
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Cinzel', serif;
    color: var(--heading);
}

h1.brand {
    font-family: 'Cinzel Decorative', serif;
}

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

a:hover {
    text-decoration: underline;
}

/* ─── Nav ───────────────────────────────────────────────────────────────── */

nav {
    background-color: var(--nav-bg);
    color: var(--nav-text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 3.5rem;
    font-family: 'Cinzel', serif;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-left > a {
    color: var(--nav-text);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.nav-left > a:hover {
    text-decoration: none;
    opacity: 0.85;
}

/* ─── Dropdown ──────────────────────────────────────────────────────────── */

.dropdown {
    position: relative;
}

.dropdown button {
    background: none;
    border: none;
    color: var(--nav-text);
    font-family: 'Cinzel', serif;
    font-size: 0.95rem;
    cursor: pointer;
    padding: 0.4rem 0.75rem;
    letter-spacing: 0.05em;
}

.dropdown button:hover {
    opacity: 0.85;
}

.dropdown ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--nav-bg);
    list-style: none;
    min-width: 10rem;
    border-top: 2px solid var(--accent);
    z-index: 100;
}

.dropdown:hover ul,
.dropdown:focus-within ul {
    display: block;
}

.dropdown ul li a {
    display: block;
    padding: 0.6rem 1rem;
    color: var(--nav-text);
    font-size: 0.9rem;
}

.dropdown ul li a:hover {
    background-color: var(--accent);
    color: #fff;
    text-decoration: none;
}

/* ─── Theme Toggle ──────────────────────────────────────────────────────── */

.nav-right {
    display: flex;
    align-items: center;
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--nav-text);
    font-family: 'Cinzel', serif;
    font-size: 0.95rem;
    cursor: pointer;
    padding: 0.4rem 0.75rem;
    display: flex;
    align-items: center;
}

#theme-toggle:hover {
    opacity: 0.85;
}

#sun-icon,
#moon-icon {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#moon-icon {
    display: none;
    opacity: 0;
}

[data-theme="dark"] #sun-icon {
    display: none;
    opacity: 0;
}

[data-theme="dark"] #moon-icon {
    display: block;
    opacity: 1;
    transform: rotate(0deg);
}

/* ─── Main Content ──────────────────────────────────────────────────────── */

main {
    flex: 1;
    padding: 2rem;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

/* ─── Conversion Table ──────────────────────────────────────────────────── */

.table-scroll {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 0.75rem;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.82rem;
    white-space: nowrap;
}

table thead th {
    background: var(--nav-bg);
    color: var(--nav-text);
    font-family: 'Cinzel', serif;
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 0.65rem 0.9rem;
    border-bottom: 2px solid var(--border);
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 2;
}

table thead th:first-child {
    text-align: left;
    position: sticky;
    left: 0;
    z-index: 3;
}

table tbody th {
    background: var(--table-row-bg);
    color: var(--heading);
    font-family: 'Cinzel', serif;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.55rem 0.9rem;
    border-right: 2px solid var(--border);
    border-bottom: 1px solid var(--border);
    text-align: left;
    position: sticky;
    left: 0;
    z-index: 1;
    white-space: nowrap;
}

table tbody td {
    padding: 0.5rem 0.9rem;
    border-bottom: 1px solid var(--border);
    border-right: 1px solid var(--border);
    text-align: center;
    font-variant-numeric: tabular-nums;
    font-family: monospace;
}

table tbody tr:last-child td,
table tbody tr:last-child th {
    border-bottom: none;
}

table td.diagonal {
    background: var(--table-diagonal);
    font-weight: 700;
    color: var(--heading);
}

table td.above {
    color: var(--text);
}

table td.below {
    color: var(--text);
    opacity: 0.6;
}

table tbody tr:hover td,
table tbody tr:hover th {
    background: var(--table-stripe);
}

table td.diagonal:hover {
    background: var(--table-diagonal);
}

/* ─── Table Legend ──────────────────────────────────────────────────────── */

.table-legend {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.75rem;
    font-size: 0.78rem;
    color: var(--text);
    font-family: 'Cinzel', serif;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-swatch {
    width: 14px;
    height: 14px;
    border-radius: 2px;
    border: 1px solid var(--border);
}

.legend-swatch.diagonal { background: var(--table-diagonal); }
.legend-swatch.above    { background: var(--bg); }
.legend-swatch.below    { background: var(--bg); opacity: 0.5; }

.foot-note {
    font-size: 0.78rem;
    font-style: italic;
    opacity: 0.75;
    margin-top: 0.5rem;
}

/* ─── Intro Section ─────────────────────────────────────────────────────── */

.intro-section {
    max-width: 720px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.intro-section p {
    margin-bottom: 1.25rem;
}

/* ─── Time Unit Sections ────────────────────────────────────────────────── */

.time-unit-section {
    max-width: 950px;
    padding: 0.5rem 0;
    margin: 0 auto;
}

.time-unit-section p {
    margin-bottom: 1rem;
}

.section-body {
    padding-left: 1.25rem;
}

.section-body ul {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.time-unit-section h2 {
    margin-bottom: 1rem;
}

.time-unit-section h3 {
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.cosmo-block {
    border-left: 3px solid var(--border);
    background: var(--table-row-bg);
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    font-style: italic;
    position: relative;
}

.cosmo-label {
    display: block;
    font-family: 'Cinzel', serif;
    font-size: 0.65rem;
    font-weight: 700;
    font-style: normal;
    letter-spacing: 0.08em;
    color: var(--heading);
    margin-bottom: 0.4rem;
}

.info-block {
    border: 1px solid var(--accent);
    border-radius: 4px;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    font-size: 0.9rem;
}

.calc-block {
    border: 1px solid var(--calc-border);
    border-radius: 4px;
    background: transparent;
    padding: 0.75rem 1rem;
    margin: 0.75rem 0;
    font-family: monospace;
    font-size: 0.9rem;
}

.live-readout {
    border: 1px solid var(--calc-border);
    background: transparent;
    border-radius: 4px;
    padding: 0.75rem 1rem;
    font-family: monospace;
    font-size: 0.85rem;
    min-width: 260px;
    max-width: 420px;
    flex: 1 1 260px;
    overflow-wrap: break-word;
}

.live-readout p {
    margin: 0;
}

.live-readout p + p {
    margin-top: 0.4rem;
}

/* ─── Time Converter ────────────────────────────────────────────────────── */

.converter-inputs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    padding: 1rem 0;
}

.converter-inputs input,
.converter-inputs select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.9rem;
}

.converter-inputs input {
    width: 10rem;
}

.converter-inputs select {
    cursor: pointer;
}

.converter-inputs span {
    color: var(--accent);
    font-size: 1.2rem;
}

.converter-inputs button {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1.25rem;
    font-family: 'Cinzel', serif;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    cursor: pointer;
}

.converter-inputs button:hover {
    opacity: 0.85;
}

.conv-output {
    min-height: 4.5rem;
    text-align: center;
    padding: 0.5rem 0;
}

#conv-result {
    font-size: 1rem;
    color: var(--heading);
    font-family: 'Cinzel', serif;
    padding-bottom: 0.25rem;
}

#conv-words {
    font-size: 0.88rem;
    color: var(--text);
    font-style: italic;
    opacity: 0.75;
}

/* ─── Ahargana Calculator ───────────────────────────────────────────────── */

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 1rem 0;
    width: fit-content;
}

.calc-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.ep-controls label {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    color: var(--text);
}

.ep-controls input[type="number"] {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.35rem 0.5rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
}

.ep-controls input[type="number"]:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.dms-input-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
}

.dms-input-wrap input[type="number"] {
    padding-right: 1.5rem;
    -moz-appearance: textfield;
}

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

.dms-spin {
    position: absolute;
    right: 4px;
    top: 3px;
    bottom: 3px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
}

.dms-spin button {
    background: var(--accent);
    color: var(--bg);
    border: none;
    border-radius: 2px;
    font-size: 0.5rem;
    line-height: 1;
    padding: 1px 4px;
    cursor: pointer;
}

.dms-spin button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ep-controls input[type="range"] {
    accent-color: var(--accent);
}

.ep-controls select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.35rem 0.5rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.85rem;
    cursor: pointer;
}

.calc-inputs select {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.9rem;
    cursor: pointer;
}

#date-error {
    align-self: center;
}

.era-btn {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-family: 'Cinzel', serif;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    cursor: pointer;
    min-width: 3rem;
}

.era-btn.bce {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.calc-mode-toggle {
    display: flex;
    gap: 0;
}

.mode-btn {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.5rem 1rem;
    font-family: 'Cinzel', serif;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    cursor: pointer;
}

.mode-btn:first-child { border-radius: 4px 0 0 4px; }
.mode-btn:last-child  { border-radius: 0 4px 4px 0; border-left: none; }

.mode-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.calc-inputs input {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-family: 'Libre Baskerville', serif;
    font-size: 0.9rem;
    width: 16rem;
}

.action-btn, #calc-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 4px;
    padding: 0.5rem 1.25rem;
    font-family: 'Cinzel', serif;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    cursor: pointer;
}

.action-btn:hover, #calc-btn:hover { opacity: 0.85; }

.mp-presets-row { margin-top: 1rem; }

/* ─── Tabs ───────────────────────────────────────────────────────────────── */

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.25rem;
    gap: 0;
}

.tab-btn {
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.5rem 1.25rem;
    font-family: 'Cinzel', serif;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    color: var(--text);
    cursor: pointer;
    margin-bottom: -1px;
    opacity: 0.6;
    transition: opacity 0.15s, border-color 0.15s, color 0.15s;
}

.tab-btn:hover { opacity: 1; }

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

.tab-panel { display: none; }
.tab-panel.active { display: block; }

#mean-position-diagram g {
    transition: transform 0.14s linear;
}

.hidden { display: none; }

#date-error {
    color: red;
    font-size: 0.8rem;
    font-family: 'Libre Baskerville', serif;
    visibility: hidden;
    margin-top: 0.2rem;
}

/* ─── Geocentric Diagram ────────────────────────────────────────────────── */

.geo-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
}

#geo-canvas {
    display: block;
    width: 100%;
    max-width: 720px;
    height: auto;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: #0a0a1a;
}

.geo-tilt-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.geo-tilt-label {
    font-family: 'Cinzel', serif;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--text);
}

.geo-tilt-value {
    font-size: 0.8rem;
    color: var(--accent);
}

.geo-tilt-hint {
    font-size: 0.65rem;
    color: var(--text);
    opacity: 0.6;
    text-align: center;
    line-height: 1.3;
}

.vertical-slider-wrap {
    width: 28px;
    height: 140px;
    position: relative;
}

.vertical-slider-wrap input[type=range] {
    position: absolute;
    width: 140px;
    height: 28px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-90deg);
    accent-color: var(--accent);
}

.geo-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.geo-speed-control {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--text);
}

.geo-speed-control input[type=range] {
    width: 100px;
    accent-color: var(--accent);
}

.slider-arrow {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 0.1rem 0.4rem;
    font-size: 0.7rem;
    line-height: 1.4;
    cursor: pointer;
}

.slider-arrow:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ─── Footer ────────────────────────────────────────────────────────────── */

footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 1rem 2rem;
    font-family: 'Cinzel', serif;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}