/* CSS Variables and Theme Setup */
:root {
    /* Spacing */
    --spacing: 0.25rem;

    /* Colors - Light Theme (Default) */
    --background: oklch(100% 0 0);
    --foreground: oklch(14.5% 0 0);
    --border: oklch(92.2% 0 0);
    --muted: oklch(97% 0 0);
    --muted-foreground: oklch(55.6% 0 0);

    /* Custom colors */
    --border-color: #b5b0b2;
    --muted-color: #999;
    --button-bg: oklch(96.8295% 6.03082e-8 none);
    --chip-bg: oklch(96.8295% 6.03082e-8 none);
    --text-color: #464143;
    --bg-color: #ffffff;

    /* Typography */
    --font-family: 'Alike Angular', serif;
    --text-lg: 1.35rem;
    --text-2xl: 1.8rem;
    --text-3xl: 2.25rem;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Border radius */
    --radius: 0.625rem;
    --radius-md: calc(var(--radius) - 2px);

    /* Transitions */
    --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-duration: 0.15s;
}

/* Dark Theme - System Preference */
@media (prefers-color-scheme: dark) {
    :root {
        /* Colors - Dark Theme */
        --background: oklch(14.5% 0 0);
        --foreground: oklch(98.5% 0 0);
        --border: oklch(26.9% 0 0);
        --muted: oklch(26.9% 0 0);
        --muted-foreground: oklch(70.8% 0 0);

        /* Custom colors */
        --border-color: #8a7f8a;
        --muted-color: #b5b0b2;
        --button-bg: #5f5a5c;
        --chip-bg: #5f5a5c;
        --text-color: #ffffff;
        --bg-color: #464143;
    }
}

/* Light Theme - Manual Toggle (when body.dark is NOT present) */
body:not(.dark) {
    --bg-color: #ffffff !important;
    --text-color: #464143 !important;
    --chip-bg: oklch(96.8295% 6.03082e-8 none) !important;
    --border-color: #b5b0b2 !important;
}

/* Dark Theme - Manual Toggle (body.dark class) */
/* Override CSS variables for dark mode */
body.dark {
    --background: oklch(14.5% 0 0);
    --foreground: oklch(98.5% 0 0);
    --border: oklch(26.9% 0 0);
    --muted: oklch(26.9% 0 0);
    --muted-foreground: oklch(70.8% 0 0);
    --border-color: #8a7f8a;
    --muted-color: #b5b0b2;
    --button-bg: #5f5a5c;
    --chip-bg: #5f5a5c;
    --text-color: #ffffff;
    --bg-color: #464143;
}

body.dark #integrity-overlay {
    background-color: #464143 !important;
}

body.dark #integrity-overlay #app,
body.dark #integrity-overlay .intro-screen,
body.dark #integrity-overlay .main-content {
    background-color: #464143;
    color: #ffffff;
}

body.dark #integrity-overlay .entry {
    background: #464143;
    border-color: #8a7f8a;
}

body.dark #integrity-overlay .chip {
    background: #5f5a5c;
    border-color: #8a7f8a;
}

body.dark #continue-btn {
    background-color: rgba(95, 90, 92, 0.9) !important;
    color: #ffffff !important;
    border-color: #8a7f8a !important;
}

body.dark #continue-btn:hover:not(:disabled) {
    background-color: rgba(95, 90, 92, 1) !important;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3) !important;
}

/* Integrity overlay default background */
#integrity-overlay {
    background-color: #ffffff;
}

/* Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border: 0 solid;
}

html {
    font-size: 18px;
    -webkit-text-size-adjust: 100%;
    tab-size: 4;
    line-height: 1.5;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

#app {
    position: relative;
    min-height: 100vh;
}

/* Intro Screen */
.intro-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: calc(var(--spacing) * 5);
}

.intro-screen.hidden {
    display: none;
}

.typing-text {
    font-size: var(--text-2xl);
    font-weight: var(--font-weight-medium);
    line-height: calc(2 / 1.5);
    letter-spacing: 0;
    text-align: center;
}

@media (min-width: 48rem) {
    .typing-text {
        font-size: var(--text-3xl);
        line-height: 1.2;
    }
}

.typing-text em {
    font-style: italic;
}

.cursor {
    display: inline-block;
    animation: blink-cursor 1.2s step-end infinite;
}

@keyframes blink-cursor {
    0%, 49% {
        opacity: 1;
    }
    50%, 100% {
        opacity: 0;
    }
}

/* Spinner */
.spinner {
    margin-top: calc(var(--spacing) * 8);
}

.spinner.hidden {
    display: none;
}

.spinner-icon {
    width: calc(var(--spacing) * 8);
    height: calc(var(--spacing) * 8);
    border: 3px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Main Content */
.main-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: calc(var(--spacing) * 5) calc(var(--spacing) * 5) calc(var(--spacing) * 20);
}

.main-content.hidden {
    display: none;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .main-content {
        padding: calc(var(--spacing) * 4) calc(var(--spacing) * 3) calc(var(--spacing) * 24);
        align-items: flex-start;
    }

    .entry {
        padding: calc(var(--spacing) * 4);
    }

    .head {
        gap: calc(var(--spacing) * 2);
    }

    /* Continue button adjustments for mobile */
    #continue-btn {
        font-size: 0.95rem !important;
        padding: 0.65rem 1.25rem !important;
        bottom: 1rem !important;
    }
}

@media (max-width: 480px) {
    .entry {
        padding: calc(var(--spacing) * 3);
    }

    .word {
        font-size: clamp(32px, 8vw, 48px);
    }

    #continue-btn {
        font-size: 0.9rem !important;
        padding: 0.6rem 1rem !important;
    }
}

/* Entry Card */
.entry {
    width: 100%;
    max-width: 96rem;
    border-radius: 18px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    padding: calc(var(--spacing) * 8);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
    transition: all var(--transition-duration) var(--ease-in-out);
}

@media (min-width: 64rem) {
    .entry {
        padding-inline: calc(var(--spacing) * 9);
    }
}

/* Header */
.head {
    margin-bottom: calc(var(--spacing) * 2);
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: calc(var(--spacing) * 4);
}

.word {
    font-size: clamp(42px, 7vw, 60px);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.2px;
    font-family: var(--font-family);
}

.pron {
    font-size: var(--text-lg);
    font-style: italic;
    color: var(--muted-color);
    font-family: var(--font-family);
    line-height: calc(1.75 / 1.125);
}

.pos {
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.6px;
    color: var(--muted-color);
    font-variant: small-caps;
}

.meta {
    font-size: 1rem;
    color: var(--muted-color);
    line-height: 1.25;
}

/* Divider */
.divider {
    margin: 18px 0;
    border: 0;
    border-top: 1px solid var(--border-color);
}

/* Sense Section */
.sense {
    margin: calc(var(--spacing) * 4) 0;
}

.sense-header {
    margin-bottom: calc(var(--spacing) * 2);
    display: flex;
    align-items: center;
    gap: calc(var(--spacing) * 2.5);
}

.sense-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.6em;
    height: 1.6em;
    border-radius: 50%;
    background: var(--chip-bg);
    font-size: 1.05rem;
    font-weight: var(--font-weight-bold);
    color: var(--muted-color);
    line-height: 1.6em;
}

.label {
    font-size: 1.05rem;
    letter-spacing: 0.8px;
    color: var(--muted-color);
    font-variant: small-caps;
}

.definition {
    font-size: 1.25rem;
    line-height: 1.7;
    margin: 0 0 0 0;
    padding: 0;
    display: block;
}

/* Chips */
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing) * 2);
    margin-top: calc(var(--spacing) * 2);
}

.chips.inline {
    display: inline-flex;
    margin-left: calc(var(--spacing) * 2);
    margin-top: calc(var(--spacing) * 2);
}

.chip {
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    background: var(--chip-bg);
    padding: calc(var(--spacing) * 0.75) calc(var(--spacing) * 2);
    font-size: 0.95rem;
}

/* Examples */
.examples {
    margin-top: calc(var(--spacing) * 2.5);
}

.example {
    position: relative;
    margin: 0;
    padding-left: 18px;
}

.example::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--muted-color);
}

/* See Also Section */
.see-also {
    margin-top: calc(var(--spacing) * 2);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

/* Conclusion Section */
.conclusion {
    margin-top: calc(var(--spacing) * 4);
}

.conclusion-text {
    font-size: 95%;
    line-height: 1.7;
    font-style: italic;
    font-weight: var(--font-weight-bold);
    color: var(--text-color);
    opacity: 0.95;
}