/* =============================================
   CorreoDesechado — Premium Dark Theme
   UI/UX Pro Max Guidelines Applied
   ============================================= */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
    /* Colors */
    --color-bg-primary: #0a1628;
    --color-bg-secondary: #0f1f3d;
    --color-bg-card: rgba(15, 31, 61, 0.7);
    --color-bg-card-hover: rgba(25, 45, 80, 0.8);
    --color-bg-glass: rgba(255, 255, 255, 0.03);
    --color-bg-glass-hover: rgba(255, 255, 255, 0.06);

    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-glow: rgba(59, 130, 246, 0.3);
    --color-accent-soft: rgba(59, 130, 246, 0.15);
    --color-purple: #8b5cf6;
    --color-cyan: #06b6d4;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;

    --color-text-primary: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-text-accent: #93c5fd;

    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(59, 130, 246, 0.4);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Borders */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px var(--color-accent-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;

    /* Z-index scale */
    --z-base: 1;
    --z-dropdown: 10;
    --z-sticky: 20;
    --z-overlay: 30;
    --z-modal: 50;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Background mesh gradient */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 80% 50% at 20% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse 50% 30% at 50% 50%, rgba(6, 182, 212, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== LAYOUT ===== */
.container {
    width: 100%;
    max-width: 720px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    position: relative;
    z-index: var(--z-base);
}

/* ===== HEADER ===== */
.header {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
    background: rgba(10, 22, 40, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

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

.header__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--color-text-primary);
}

.header__icon {
    width: 32px;
    height: 32px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.header__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.header__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    display: none;
}

@media (min-width: 640px) {
    .header__tagline {
        display: block;
    }
}

/* ===== MAIN ===== */
.main {
    flex: 1;
    padding: var(--space-10) 0 var(--space-16);
}

/* ===== EMAIL SECTION ===== */
.email-section {
    text-align: center;
    margin-bottom: var(--space-10);
}

.email-section__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

.email-card {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 2px;
    /* For gradient border */
    background: linear-gradient(135deg, var(--color-accent), var(--color-purple), var(--color-cyan));
    max-width: 100%;
}

.email-card__glow {
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    background: linear-gradient(135deg, var(--color-accent), var(--color-purple), var(--color-cyan));
    filter: blur(16px);
    opacity: 0.3;
    z-index: -1;
    animation: pulseGlow 3s ease-in-out infinite alternate;
}

@keyframes pulseGlow {
    0% {
        opacity: 0.2;
        filter: blur(16px);
    }

    100% {
        opacity: 0.4;
        filter: blur(24px);
    }
}

.email-card__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-6);
    background: var(--color-bg-secondary);
    border-radius: calc(var(--radius-lg) - 2px);
}

.email-card__address {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    word-break: break-all;
    text-align: left;
    flex: 1;
    min-width: 0;
}

@media (min-width: 640px) {
    .email-card__address {
        font-size: var(--font-size-2xl);
    }
}

/* ===== COPY FEEDBACK ===== */
.copy-feedback {
    font-size: var(--font-size-sm);
    color: var(--color-success);
    margin-top: var(--space-3);
    min-height: 1.5em;
    transition: opacity var(--transition-base);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 44px;
    min-width: 44px;
    padding: var(--space-3) var(--space-4);
    position: relative;
    outline: none;
}

.btn:focus-visible {
    box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.btn__icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn--copy {
    background: var(--color-accent);
    color: white;
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.btn--copy:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

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

.btn--primary {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    margin-top: var(--space-6);
}

.btn--primary:hover {
    color: var(--color-accent);
    border-color: var(--color-border-hover);
    background: var(--color-accent-soft);
}

.btn--ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-glass-hover);
}

/* ===== TIMER ===== */
.timer-section {
    text-align: center;
    margin-bottom: var(--space-12);
}

.timer-section__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
}

.timer {
    position: relative;
    width: 140px;
    height: 140px;
    margin: 0 auto;
}

.timer__ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.timer__bg {
    fill: none;
    stroke: var(--color-border);
    stroke-width: 4;
}

.timer__progress {
    fill: none;
    stroke: url(#timerGradient);
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 326.73;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear;
}

.timer__display {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.timer__value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-primary);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}

.timer__unit {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Timer warning state (< 2 min) */
.timer--warning .timer__value {
    color: var(--color-warning);
}

.timer--warning .timer__progress {
    stroke: var(--color-warning);
}

/* Timer danger state (< 30s) */
.timer--danger .timer__value {
    color: var(--color-danger);
    animation: blink 1s step-end infinite;
}

.timer--danger .timer__progress {
    stroke: var(--color-danger);
}

@keyframes blink {
    50% {
        opacity: 0.5;
    }
}

/* Timer expired state */
.timer--expired .timer__value {
    color: var(--color-text-muted);
    animation: none;
}

.timer--expired .timer__progress {
    stroke: var(--color-text-muted);
    opacity: 0.3;
}

.timer--expired .timer__unit {
    color: var(--color-danger);
}

/* Expired email card */
.email-card__content--expired {
    opacity: 0.5;
    filter: grayscale(0.3);
}

/* Highlight renewal button */
.btn--highlight {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
    animation: pulseBtn 2s ease-in-out infinite;
}

.btn--highlight:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

@keyframes pulseBtn {

    0%,
    100% {
        box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4);
    }

    50% {
        box-shadow: 0 0 0 12px rgba(59, 130, 246, 0);
    }
}

/* ===== INBOX ===== */
.inbox-section {
    margin-bottom: var(--space-8);
}

.inbox-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.inbox-header__title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
}

.inbox-header__icon {
    width: 22px;
    height: 22px;
    color: var(--color-accent);
}

.inbox-header__status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.inbox-header__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-success);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(0.8);
    }
}

/* Empty state */
.inbox-empty {
    text-align: center;
    padding: var(--space-16) var(--space-6);
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-bg-glass);
}

.inbox-empty__icon {
    width: 48px;
    height: 48px;
    color: var(--color-text-muted);
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.inbox-empty__text {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.inbox-empty__subtext {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Email list */
.inbox-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.inbox-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-5);
    background: var(--color-bg-card);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    min-height: 72px;
}

.inbox-item:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
}

.inbox-item:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

.inbox-item--unread {
    border-left: 3px solid var(--color-accent);
}

.inbox-item--unread .inbox-item__subject {
    font-weight: 600;
    color: var(--color-text-primary);
}

.inbox-item__avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--color-accent-soft);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 700;
    flex-shrink: 0;
    text-transform: uppercase;
}

.inbox-item__content {
    flex: 1;
    min-width: 0;
}

.inbox-item__top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-1);
}

.inbox-item__from {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.inbox-item__date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.inbox-item__subject {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.inbox-item__preview {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== EMAIL READER OVERLAY ===== */
.email-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: var(--z-modal);
    display: flex;
    align-items: stretch;
    justify-content: flex-end;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
}

.email-overlay--active {
    opacity: 1;
    pointer-events: auto;
}

.email-reader {
    width: 100%;
    max-width: 600px;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--transition-slow) cubic-bezier(0.16, 1, 0.3, 1);
    padding: var(--space-6);
}

.email-overlay--active .email-reader {
    transform: translateX(0);
}

.email-reader__header {
    margin-bottom: var(--space-6);
}

.email-reader__meta {
    display: flex;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.email-reader__avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--color-accent-soft);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: 700;
    flex-shrink: 0;
}

.email-reader__info {
    flex: 1;
    min-width: 0;
}

.email-reader__subject {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.email-reader__from {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}

.email-reader__date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.email-reader__divider {
    height: 1px;
    background: var(--color-border);
    margin-bottom: var(--space-6);
}

.email-reader__body {
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.email-reader__body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}

.email-reader__body a {
    color: var(--color-text-accent);
    text-decoration: underline;
}

/* ===== FOOTER ===== */
.footer {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-1);
}

.footer__disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 639px) {
    .email-card__content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }

    .email-card__address {
        text-align: center;
        font-size: var(--font-size-base);
    }

    .btn--copy {
        width: 100%;
        justify-content: center;
    }

    .timer {
        width: 120px;
        height: 120px;
    }

    .timer__value {
        font-size: var(--font-size-2xl);
    }

    .inbox-item {
        padding: var(--space-3) var(--space-4);
    }

    .inbox-item__avatar {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-xs);
    }

    .email-reader {
        max-width: 100%;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}