/* style.css */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&display=swap');

:root {
    --bg-main: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.95);
    --text-main: #f3f4f6;
    --text-sec: #94a3b8;
    --brand-spotify: #1DB954;
    --brand-youtube: #FF0000;
    --success: #10b981;
    --danger: #ef4444;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Montserrat', sans-serif;
    background: linear-gradient(to bottom, #0f172a 0%, #1e1b4b 100%);
    color: var(--text-main);
    min-height: 100vh;
}

header {
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand-title {
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
    color: white;
}

.platform-tabs { display: flex; gap: 15px; }

.tab-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-sec);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.tab-btn:hover { background: rgba(255, 255, 255, 0.1); }
.tab-btn.active[data-target="spotify"] { background: rgba(29, 185, 84, 0.15); color: var(--brand-spotify); border-color: var(--brand-spotify); }
.tab-btn.active[data-target="youtube"] { background: rgba(255, 0, 0, 0.15); color: var(--brand-youtube); border-color: var(--brand-youtube); }

.controls-bar {
    background: rgba(0, 0, 0, 0.2);
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.view-selector {
    display: flex;
    background: rgba(255, 255, 255, 0.05);
    padding: 4px;
    border-radius: 10px;
}

.mode-btn {
    padding: 8px 20px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-sec);
    cursor: pointer;
    font-weight: 700;
    transition: 0.3s;
}

.mode-btn.active {
    background: var(--card-bg);
    color: white;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.date-picker-wrapper { display: flex; align-items: center; gap: 10px; }

.date-input {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: white;
    padding: 8px 15px;
    border-radius: 8px;
    font-family: inherit;
    cursor: pointer;
}
.date-input::-webkit-calendar-picker-indicator { filter: invert(1); cursor: pointer; }

.container { max-width: 1200px; margin: 40px auto; padding: 0 20px; }

.data-header {
    display: grid;
    grid-template-columns: 90px 3fr 1.5fr 1.5fr 1.5fr;
    padding: 15px 20px;
    color: var(--text-sec);
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 800;
    letter-spacing: 1px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 10px;
}

.data-row {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 10px;
    padding: 15px 20px;
    display: grid;
    grid-template-columns: 90px 3fr 1.5fr 1.5fr 1.5fr;
    align-items: center;
    transition: transform 0.2s;
}

.data-row:hover { transform: translateY(-2px); border-color: rgba(255,255,255,0.2); }

.col-rank { font-weight: 900; font-size: 1.2rem; display: flex; align-items: center; gap: 10px; }
.col-title { font-weight: 700; }
.col-daily { font-weight: 800; }
.col-total { color: var(--text-sec); font-weight: 600; }

.change {
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 20px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 4px;
    width: fit-content;
}

.change.up { background: rgba(16, 185, 129, 0.15); color: var(--success); }
.change.down { background: rgba(239, 68, 68, 0.15); color: var(--danger); }
.change.new { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.change.neutral { background: rgba(255,255,255,0.05); color: var(--text-sec); }

.diff-text { font-size: 0.85rem; font-weight: 700; }
.diff-text.up { color: var(--success); }
.diff-text.down { color: var(--danger); }
.diff-text.neutral { color: var(--text-sec); }

.load-more-container { text-align: center; margin-top: 30px; margin-bottom: 50px; }
.btn-load {
    background: rgba(255, 255, 255, 0.1); color: white; border: 1px solid var(--border-color);
    padding: 12px 30px; border-radius: 25px; font-size: 0.9rem; font-weight: 700;
    cursor: pointer; transition: 0.3s;
}
.btn-load:hover { background: white; color: var(--bg-main); }

@media (max-width: 768px) {
    header, .controls-bar { flex-direction: column; gap: 15px; padding: 15px; }
    .data-header { display: none; }
    .data-row { grid-template-columns: 1fr; gap: 10px; position: relative; }
    .col-rank { position: absolute; top: 15px; right: 15px; }
    .col-title { padding-right: 70px; font-size: 1.1rem; }
    .col-daily::before { content: attr(data-label) ': '; color: var(--text-sec); font-size: 0.8rem; }
    .col-diff::before { content: 'Diff: '; color: var(--text-sec); font-size: 0.8rem; }
    .col-total::before { content: 'Total: '; color: var(--text-sec); font-size: 0.8rem; }
}