:root {
    --bg-main: #fcfcfb;
    --bg-secondary: #f4efea;
    --bg-card: #f8f6f3;
    --text-dark: #302c29;
    --text-gray: #7a736d;
    --accent-brown: #8a7360;
    --accent-hover: #735f4f;
    --red-heart: #d93838;
    --border-color: #e8e3dd;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 4rem;
    background-color: var(--bg-main);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo { font-size: 1.25rem; font-weight: 600; letter-spacing: -0.5px; }
.nav-links { display: flex; gap: 1rem; }

.nav-btn {
    background: none; border: none; padding: 0.5rem 1rem; border-radius: 20px;
    font-size: 0.9rem; color: var(--text-gray); cursor: pointer; transition: all 0.2s;
}
.nav-btn:hover { color: var(--text-dark); }
.nav-btn.active { background-color: var(--bg-secondary); color: var(--text-dark); }

main { flex: 1; display: flex; flex-direction: column; }
.view-section { display: none; flex: 1; }
.view-section.active { display: flex; }

#view-today { flex-direction: row; }
.today-left { flex: 1; padding: 4rem; display: flex; flex-direction: column; justify-content: center; }

.quote-label {
    font-size: 0.75rem; text-transform: uppercase; letter-spacing: 2px;
    color: var(--text-gray); margin-bottom: 2rem; display: flex; align-items: center; gap: 1rem;
}
.quote-label::before { content: ""; display: block; width: 30px; height: 1px; background-color: var(--border-color); }

.main-quote { font-size: 4rem; line-height: 1.1; font-weight: 500; letter-spacing: -1px; margin-bottom: 2rem; color: var(--text-dark); }
.main-author { font-size: 1.1rem; color: var(--text-gray); font-style: italic; margin-bottom: 0.25rem; }
.main-category { font-size: 0.85rem; color: var(--text-gray); margin-bottom: 3rem; text-transform: uppercase; letter-spacing: 1px; }

.action-buttons { display: flex; gap: 1rem; margin-bottom: 1.5rem; align-items: center; flex-wrap: wrap; }
.btn {
    display: flex; align-items: center; gap: 0.5rem; padding: 0.75rem 1.25rem; border-radius: 24px;
    font-size: 0.9rem; cursor: pointer; border: 1px solid var(--border-color); background: transparent; color: var(--text-dark); transition: all 0.2s;
}
.btn-primary { background-color: var(--accent-brown); color: white; border-color: var(--accent-brown); }
.btn-primary:hover { background-color: var(--accent-hover); }
.btn:not(.btn-primary):hover { background-color: var(--bg-card); }

.tip { font-size: 0.8rem; color: var(--text-gray); }
.tip kbd { background-color: var(--bg-secondary); padding: 0.2rem 0.4rem; border-radius: 4px; font-family: monospace; }

.today-right { flex: 1; background: linear-gradient(135deg, #f4efea 0%, #e8dccb 100%); display: flex; align-items: center; justify-content: center; }
.quote-mark-bg { font-size: 12rem; color: rgba(0,0,0,0.05); font-family: serif; line-height: 1; user-select: none; }

.page-container { padding: 3rem 4rem; width: 100%; max-width: 1200px; margin: 0 auto; }
.page-header { font-size: 3rem; font-weight: 600; margin-bottom: 1rem; letter-spacing: -1px; }
.page-subtitle { color: var(--text-gray); font-size: 1.1rem; margin-bottom: 3rem; max-width: 600px; line-height: 1.5; }

.controls-row { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; flex-wrap: wrap; gap: 1rem; }
.filters { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.filter-btn { padding: 0.5rem 1rem; border-radius: 20px; border: 1px solid var(--border-color); background: transparent; color: var(--text-gray); cursor: pointer; font-size: 0.9rem; transition: all 0.2s; }
.filter-btn.active { background-color: var(--text-dark); color: white; border-color: var(--text-dark); }
.search-bar { padding: 0.6rem 1.2rem; border-radius: 20px; border: 1px solid var(--border-color); background: transparent; width: 250px; font-size: 0.9rem; outline: none; }

.quotes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.quote-card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 16px; padding: 2rem; display: flex; flex-direction: column; transition: transform 0.2s; }
.quote-card:hover { transform: translateY(-2px); }
.card-tag { background-color: rgba(0,0,0,0.04); padding: 0.3rem 0.6rem; border-radius: 12px; font-size: 0.75rem; color: var(--text-gray); align-self: flex-start; margin-bottom: 1.5rem; }
.card-text { font-size: 1.25rem; line-height: 1.4; flex: 1; margin-bottom: 2rem; color: var(--text-dark); }
.card-footer { display: flex; justify-content: space-between; align-items: center; }
.card-author { color: var(--text-gray); font-size: 0.9rem; font-style: italic; }
.heart-btn { background: none; border: none; cursor: pointer; color: var(--text-gray); font-size: 1.2rem; transition: color 0.2s; }
.heart-btn.liked { color: var(--red-heart); }

.about-content { max-width: 700px; }
.about-content p { margin-bottom: 1.5rem; line-height: 1.6; color: var(--text-dark); font-size: 1.1rem; }
.about-quote { font-style: italic; font-size: 1.2rem; margin-top: 2rem; }

footer { padding: 2rem 4rem; display: flex; justify-content: space-between; color: var(--text-gray); font-size: 0.85rem; border-top: 1px solid var(--border-color); margin-top: auto; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 768px) {
    #view-today { flex-direction: column; }
    .today-right { display: none; }
    .main-quote { font-size: 2.5rem; }
    nav { padding: 1rem 2rem; }
    .page-container, footer { padding: 2rem; }
}