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

:root {
    --ocean:        #0a6e8a;
    --ocean-dark:   #075670;
    --ocean-mid:    #0e5f76;
    --turquoise:    #41b5cc;
    --sand:         #e8a84a;
    --sand-light:   #f5d390;
    --navy:         #0d2f3e;
    --text:         rgba(255,255,255,.92);
    --text-muted:   rgba(255,255,255,.58);
    --glass-bg:     rgba(235,248,255,.18);
    --glass-border: rgba(255,255,255,.22);
    --glass-shadow: 0 8px 40px rgba(0,0,0,.28);
    --radius:       20px;
    --transition:   .3s ease;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    background-color: #0a3545;
    background-image:
        linear-gradient(160deg, rgba(8,42,58,.52) 0%, rgba(4,80,105,.58) 100%),
        url('https://images.unsplash.com/photo-1507525428034-b723cf961d3e?w=1920&q=85');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

/* ── Container ── */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Nav ── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(8,38,52,.88);
    backdrop-filter: blur(18px) saturate(1.4);
    -webkit-backdrop-filter: blur(18px) saturate(1.4);
    border-bottom: 1px solid rgba(255,255,255,.1);
    box-shadow: 0 2px 24px rgba(0,0,0,.22);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.45rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: .4px;
    flex-shrink: 0;
}
.nav-logo span { color: var(--sand); }

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.nav-links a {
    color: rgba(255,255,255,.78);
    text-decoration: none;
    font-size: .88rem;
    font-weight: 500;
    letter-spacing: .3px;
    transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--sand); }

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    background: none;
    border: none;
}
.hamburger span {
    display: block;
    width: 24px; height: 2px;
    background: white;
    border-radius: 2px;
    transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Page wrapper ── */
.page {
    width: 100%;
    padding: 118px 0 56px;
    min-height: 100vh;
}

/* ── Hero / picker glass card ── */
.hero-box {
    background: rgba(235,248,255,.18);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,.22);
    box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255,255,255,.18);
    padding: 28px 30px;
    margin-bottom: 24px;
}

.hero-box h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: #fff;
    line-height: 1.1;
    text-shadow: 0 2px 12px rgba(0,0,0,.3);
}
.hero-box p {
    color: rgba(255,255,255,.72);
    margin-top: 8px;
}

/* ── Apartment picker ── */
.apt-picker {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin: 0 0 20px;
}

.apt-btn {
    position: relative;
    border: none;
    border-radius: 16px;
    padding: 15px 14px;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
    font-size: .9rem;
    text-align: center;
    background: rgba(255,255,255,.07);
    backdrop-filter: blur(22px) saturate(2) brightness(1.06);
    -webkit-backdrop-filter: blur(22px) saturate(2) brightness(1.06);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,.28),
        inset 0 -1px 0 rgba(0,0,0,.06),
        0 4px 14px rgba(0,0,0,.2),
        0 2px 4px rgba(0,0,0,.1);
    color: rgba(255,255,255,.7);
    transition: transform var(--transition), box-shadow var(--transition);
    overflow: hidden;
    word-break: break-word;
}

.apt-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: linear-gradient(135deg,
        rgba(100,220,255,.28) 0%,
        rgba(255,255,255,.04) 50%,
        rgba(100,220,255,.18) 100%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    transition: background var(--transition);
}

.apt-btn.active::before {
    background: linear-gradient(135deg,
        rgba(65,200,230,.92) 0%,
        rgba(255,255,255,.22) 50%,
        rgba(65,200,230,.72) 100%);
}

.apt-btn::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 50%;
    border-radius: 16px 16px 60% 60%;
    background: linear-gradient(180deg, rgba(255,255,255,.32) 0%, rgba(255,255,255,.04) 100%);
    pointer-events: none;
}

.apt-btn:hover {
    transform: translateY(-3px);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.55),
        inset 0 -1px 0 rgba(0,0,0,.2),
        0 10px 32px rgba(0,0,0,.38),
        0 4px 14px rgba(0,0,0,.24);
}

.apt-btn.active {
    background: linear-gradient(180deg, rgba(10,110,138,.78) 0%, rgba(5,70,90,.88) 100%);
    color: #fff;
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.6),
        inset 0 -1px 0 rgba(0,0,0,.22),
        0 6px 28px rgba(10,110,138,.6),
        0 0 0 1px rgba(65,200,230,.28),
        0 4px 16px rgba(0,0,0,.28);
    transform: translateY(-1px);
}

/* ── Calendar glass card ── */
.calendar-wrap {
    width: 100%;
    background: rgba(235,248,255,.15);
    backdrop-filter: blur(28px) saturate(1.3);
    -webkit-backdrop-filter: blur(28px) saturate(1.3);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,.2);
    box-shadow: var(--glass-shadow), inset 0 1px 0 rgba(255,255,255,.14);
    padding: 24px;
    display: none;
}
.calendar-wrap.show { display: block; }

/* ── Calendar head ── */
.calendar-head {
    margin-bottom: 16px;
}

.cal-header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.cal-page-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    color: #fff;
    font-weight: 700;
    text-shadow: 0 2px 12px rgba(0,0,0,.3);
}

/* ── Legend (vertical, beside grid) ── */
.legend {
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: .84rem;
    color: rgba(255,255,255,.75);
    flex-shrink: 0;
    padding-top: 30px;
}
.legend span::before {
    content: '';
    width: 10px; height: 10px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
    vertical-align: middle;
}
.legend .free::before    { background: #34c759; }
.legend .busy::before    { background: #dc2d23; }
.legend .pending::before { background: #3b82f6; }
.legend .gap::before     { background: #ff871e; }

/* ── Month nav (centred, ← name →) ── */
.cal-month-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
}

/* ── Cal body: grid + legend side by side ── */
.cal-body {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 24px;
}

.cal-arrow-btn {
    width: 46px; height: 46px;
    border-radius: 50%;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.3);
    background: rgba(255,255,255,.08);
    backdrop-filter: blur(18px) saturate(2) brightness(1.06);
    -webkit-backdrop-filter: blur(18px) saturate(2) brightness(1.06);
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.68),
        inset 0 -1px 0 rgba(0,0,0,.1),
        0 4px 18px rgba(0,0,0,.22),
        0 2px 6px rgba(0,0,0,.14);
    flex-shrink: 0;
}
.cal-arrow-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 50%;
    border-radius: 50%;
    background: linear-gradient(180deg, rgba(255,255,255,.32) 0%, transparent 100%);
    pointer-events: none;
}
.cal-arrow-btn:hover:not(:disabled) {
    background: rgba(255,255,255,.14);
    border-color: rgba(255,255,255,.48);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.8),
        inset 0 -1px 0 rgba(0,0,0,.12),
        0 8px 26px rgba(0,0,0,.3),
        0 4px 12px rgba(0,0,0,.18);
    transform: scale(1.1);
}
.cal-arrow-btn:disabled {
    border-color: rgba(255,255,255,.08);
    color: rgba(255,255,255,.2);
    cursor: default;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.cal-arrow-btn:disabled::before { display: none; }

.cal-month-center {
    text-align: center;
    min-width: 130px;
}

.cal-month-name {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: .2px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,.28);
}

.cal-year-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-top: 4px;
}

.cal-year-text {
    font-size: .8rem;
    color: rgba(255,255,255,.62);
    font-weight: 600;
    min-width: 32px;
    text-align: center;
}

.cal-year-step {
    background: none;
    border: none;
    color: rgba(255,255,255,.5);
    cursor: pointer;
    font-size: .65rem;
    width: 20px; height: 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}
.cal-year-step:hover:not(:disabled) {
    color: #fff;
    background: rgba(255,255,255,.14);
}
.cal-year-step:disabled {
    color: rgba(255,255,255,.18);
    cursor: default;
}

/* ── Calendar grid ── */
.calendar-grid {
    max-width: 440px;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: 6px;
}

.day-head {
    text-align: center;
    color: rgba(255,255,255,.55);
    font-size: .75rem;
    font-weight: 700;
    padding: 4px 0 8px;
    letter-spacing: .4px;
    text-transform: uppercase;
}

/* ── Day bubbles (Apple Liquid Glass) ─────────────────────────── */
.day {
    aspect-ratio: 1;
    border-radius: 50%;
    position: relative;
    overflow: hidden;
    background: rgba(255,255,255,.07);
    border: 1px solid rgba(255,255,255,.3);
    backdrop-filter: blur(18px) saturate(2) brightness(1.06);
    -webkit-backdrop-filter: blur(18px) saturate(2) brightness(1.06);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.72),
        inset 0 -1px 0 rgba(0,0,0,.1),
        0 6px 22px rgba(0,0,0,.22),
        0 2px 6px rgba(0,0,0,.14);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: .9rem;
    color: rgba(255,255,255,.92);
    cursor: default;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

/* Specular / caustic arc — top shine */
.day::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 50%;
    border-radius: 50% 50% 80% 80% / 55% 55% 45% 45%;
    background: linear-gradient(
        180deg,
        rgba(255,255,255,.36) 0%,
        rgba(255,255,255,.04) 100%
    );
    pointer-events: none;
}

.day:hover:not(.past):not(.closed):not(.empty) {
    transform: scale(1.12);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.82),
        inset 0 -1px 0 rgba(0,0,0,.12),
        0 10px 30px rgba(0,0,0,.3),
        0 4px 12px rgba(0,0,0,.18);
}

.day.empty {
    background: transparent;
    border-color: transparent;
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.day.empty::before { display: none; }

.day.past {
    background: rgba(255,255,255,.02);
    border-color: rgba(255,255,255,.07);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    color: rgba(255,255,255,.2);
}
.day.past::before { display: none; }

.day.closed {
    background: rgba(255,255,255,.02);
    border-color: rgba(255,255,255,.05);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    color: rgba(255,255,255,.13);
}
.day.closed::before { display: none; }

.day.free {
    background: rgba(52,199,89,.10);
    border-color: rgba(52,199,89,.42);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.6),
        inset 0 -1px 0 rgba(0,0,0,.07),
        0 6px 22px rgba(0,0,0,.16),
        0 4px 18px rgba(52,199,89,.22);
    color: #fff;
}

.day.busy {
    background: rgba(220,45,35,.13);
    border-color: rgba(220,45,35,.45);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.52),
        inset 0 -1px 0 rgba(0,0,0,.08),
        0 6px 22px rgba(0,0,0,.18),
        0 4px 18px rgba(220,45,35,.22);
    color: #fff;
}

.day.pending {
    background: rgba(59,130,246,.11);
    border-color: rgba(59,130,246,.45);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.55),
        inset 0 -1px 0 rgba(0,0,0,.07),
        0 6px 22px rgba(0,0,0,.16),
        0 4px 18px rgba(59,130,246,.22);
    color: #fff;
}

.day.gap {
    background: rgba(255,135,30,.11);
    border-color: rgba(255,135,30,.45);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.55),
        inset 0 -1px 0 rgba(0,0,0,.07),
        0 6px 22px rgba(0,0,0,.16),
        0 4px 18px rgba(255,135,30,.22);
    color: #fff;
}

.day.today {
    border-color: rgba(255,255,255,.72);
    box-shadow:
        inset 0 1.5px 0 rgba(255,255,255,.82),
        inset 0 -1px 0 rgba(0,0,0,.1),
        0 0 0 2px rgba(255,255,255,.55),
        0 8px 26px rgba(0,0,0,.28);
}

/* ── Summary ── */
.summary {
    margin-top: 18px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,.18);
    background: rgba(235,248,255,.12);
    backdrop-filter: blur(12px);
    padding: 16px 18px;
    color: rgba(255,255,255,.88);
}
.summary strong {
    display: block;
    color: #fff;
    margin-bottom: 7px;
    font-size: 1rem;
}
.summary-hint        { display: block; color: rgba(255,255,255,.6); font-size: .9rem; }
.summary-hint.error  { color: #ff8a80; }
.summary-dates       { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.summary-date-item   { display: flex; align-items: center; gap: 5px; }
.summary-nights      { font-weight: 700; color: var(--turquoise); margin-left: auto; }
.summary .reserve-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 12px;
}

/* ── Buttons ── */
.btn {
    border: none;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
    padding: 10px 18px;
    font-family: 'Inter', sans-serif;
    transition: transform var(--transition), box-shadow var(--transition);
}
.btn-primary {
    background: linear-gradient(135deg, var(--sand), var(--sand-light));
    color: var(--navy);
    box-shadow: 0 4px 14px rgba(232,168,74,.38);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232,168,74,.45);
}
.btn-secondary {
    background: rgba(255,255,255,.14);
    color: #fff;
    border: 1px solid rgba(255,255,255,.22);
}
.btn-secondary:hover {
    background: rgba(255,255,255,.22);
    transform: translateY(-2px);
}

/* ── Responsive 960px ── */
@media (max-width: 960px) {
    .apt-picker { grid-template-columns: 1fr; }
    .hamburger { display: flex; }
    .nav-links {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: rgba(8,38,52,.96);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 26px 24px;
        gap: 18px;
        box-shadow: 0 8px 24px rgba(0,0,0,.3);
        border-bottom: 1px solid rgba(255,255,255,.1);
    }
    .nav-links.open { display: flex; }
}

/* ── Responsive 640px: legend drops below grid ── */
@media (max-width: 640px) {
    .cal-body {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    .legend {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        padding-top: 0;
        gap: 14px;
    }
    .calendar-grid {
        max-width: 100%;
    }
}

/* ── Responsive 600px ── */
@media (max-width: 600px) {
    .page { padding: 106px 0 32px; }
    .container { padding: 0 14px; }
    .calendar-wrap { padding: 16px 12px; }
    .apt-picker {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 10px;
    }
    .apt-btn {
        padding: 12px 8px;
        font-size: .8rem;
        border-radius: 14px;
    }
    .day { font-size: .78rem; }
    .day-head { font-size: .62rem; }
    .calendar-grid { gap: 4px; }
    .cal-month-name { font-size: 1.4rem; }
    .cal-month-center { min-width: 110px; }
    .cal-arrow-btn { width: 38px; height: 38px; font-size: .88rem; }
}