:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --success: #22c55e;
    --warning: #eab308;
    --danger: #ef4444;
    --glass-border: rgba(255, 255, 255, 0.1);
}

body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at top right, #1e293b, #0f172a);
    color: var(--text-primary);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

h1,
h2,
h3 {
    font-weight: 700;
    letter-spacing: -0.025em;
    margin-bottom: 1.5rem;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Navigation */
nav {
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
}

nav .logo {
    font-weight: 800;
    font-size: 1.25rem;
    background: linear-gradient(135deg, #38bdf8, #818cf8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

nav .nav-links {
    display: flex;
    gap: 1.5rem;
}

nav .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    transition: color 0.2s;
}

nav .nav-links a:hover {
    color: var(--text-primary);
}

/* Table Grid */
.mesas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
}

.mesa-card {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.mesa-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.mesa-card.livre {
    border-color: var(--success);
    color: var(--success);
}

.mesa-card.atendimento {
    border-color: var(--warning);
    color: var(--warning);
}

.mesa-number {
    font-size: 2.5rem;
    font-weight: 800;
}

.mesa-status {
    font-size: 0.75rem;
    text-transform: uppercase;
    font-weight: 600;
    margin-top: 0.5rem;
}

.mesa-info {
    width: 100%;
    text-align: left;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}


/* Item List */
.items-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: 0.75rem;
    background: rgba(255, 255, 255, 0.05);
    transition: background 0.2s;
    cursor: pointer;
}

.item-row:hover {
    background: rgba(255, 255, 255, 0.1);
}

.item-info {
    display: flex;
    flex-direction: column;
}

.item-name {
    font-weight: 600;
}

.item-price {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.2s;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn:active {
    filter: brightness(0.9);
}

/* Modal and Overlays */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.modal {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

/* Utils */
.hidden {
    display: none !important;
}

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

.mt-4 {
    margin-top: 1rem;
}

/* Responsive Adjustments: Tablets and Small Desktops */
@media (max-width: 1024px) {
    .container {
        padding: 0.5rem;
    }

    .mesas-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 1rem;
    }

    .mesa-card {
        padding: 1rem;
    }

    .mesa-number {
        font-size: 2rem;
    }
}

/* Responsive Adjustments: Mobile Phones */
@media (max-width: 600px) {
    nav {
        flex-direction: column;
        gap: 0.5rem;
        padding: 1rem 0.5rem;
    }

    nav .logo {
        font-size: 1.1rem;
        text-align: center;
    }

    nav .nav-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    nav .nav-links a {
        padding: 0.4rem 0.6rem;
        font-size: 0.75rem;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--glass-border);
        border-radius: 0.5rem;
    }

    .mesas-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .mesa-card {
        min-height: 110px;
        aspect-ratio: auto;
        /* Let it scale vertically instead of forcing square */
        padding: 0.75rem;
    }

    .mesa-number {
        font-size: 1.6rem;
    }

    .mesa-status {
        font-size: 0.65rem;
    }

    h1,
    h2,
    h3 {
        font-size: 1.3rem;
        margin-bottom: 0.75rem;
    }

    .glass-card {
        padding: 1rem;
    }

    .modal {
        padding: 1.25rem;
        max-width: 100%;
        margin: 0;
        box-sizing: border-box;
    }

    /* Change flex-row behavior from column to wrapping row to save space */
    .flex-row {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
    }

    /* Forms */
    #add-item-form {
        flex-direction: column;
        align-items: stretch;
    }

    #add-item-form>div {
        width: 100%;
    }

    /* Buttons */
    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    /* Inputs */
    input,
    select {
        width: 100%;
        box-sizing: border-box;
        font-size: 16px;
        /* Prevents iOS auto-zoom */
    }

    /* Tiny text sizes in tables */
    table,
    th,
    td {
        font-size: 0.75rem;
    }
}