@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;1,300&display=swap');

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

/* ── Variables ── */
:root {
    --bg-dark:        #080c10;
    --surface-dark:   #0e1318;
    --glass-dark:     rgba(255, 255, 255, 0.04);
    --border-dark:    rgba(255, 255, 255, 0.08);
    --text-primary:   #f0f4f8;
    --text-secondary: #7a8a9a;
    --text-muted:     #3a4a5a;

    --bg-light:       #f0f4f8;
    --surface-light:  #ffffff;
    --glass-light:    rgba(0, 0, 0, 0.03);
    --border-light:   rgba(0, 0, 0, 0.08);
    --text-primary-l: #0d1117;
    --text-secondary-l:#556070;

    /* Accent: hot coral-pink → electric blue */
    --accent-a: #ff3c6e;
    --accent-b: #0070f3;
    --gradient: linear-gradient(135deg, var(--accent-a), var(--accent-b));

    --radius-sm:  8px;
    --radius-md:  16px;
    --radius-lg:  24px;
    --radius-pill:999px;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
    --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-lg: 0 24px 64px rgba(0,0,0,0.5);

    --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Base ── */
html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
    padding: 24px 16px 64px;
    transition: background-color var(--transition), color var(--transition);
    /* Subtle noise texture */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
}

body.dark-mode {
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

body.light-mode {
    background-color: var(--bg-light);
    color: var(--text-primary-l);
}

body.light-mode .main-title {
    background: none;
    -webkit-text-fill-color: initial;
    color: #0d1117; /* your light text color */
}

/* ── Theme toggle ── */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    inset: 0;
    cursor: pointer;
    background-color: var(--text-muted);
    border-radius: var(--radius-pill);
    transition: background-color var(--transition);
}

.slider::before {
    content: "";
    position: absolute;
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background: #fff;
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: var(--shadow-sm);
}

input:checked + .slider {
    background: var(--gradient);
}

input:checked + .slider::before {
    transform: translateX(22px);
}

/* ── Container ── */
.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 40px;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-dark);
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

body.dark-mode .container {
    background: var(--surface-dark);
    border-color: var(--border-dark);
}

body.light-mode .container {
    background: var(--surface-light);
    border-color: var(--border-light);
    box-shadow: 0 8px 48px rgba(0,0,0,0.08);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Main title ── */
.main-title {
    font-family: 'Montserrat', sans-serif;
    font-weight: 800;
    font-size: clamp(28px, 5vw, 46px);
    letter-spacing: -0.03em;
    text-align: center;
    margin-bottom: 8px;
    /* Gradient text */
    background: white;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.title-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.logo {
    height: 70px;
    width: auto;
    display: block;
}

/* ── Header ── */
header {
    text-align: center;
    margin-bottom: 40px;
}

header h2 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 18px;
    letter-spacing: 0.01em;
    margin-bottom: 6px;
}

body.dark-mode header h2 { color: var(--text-primary); }
body.light-mode header h2 { color: var(--text-primary-l); }

header p {
    font-size: 14px;
    font-weight: 300;
}

body.dark-mode header p { color: var(--text-secondary); }
body.light-mode header p { color: var(--text-secondary-l); }

/* ── Divider between title and header ── */
header::before {
    content: "";
    display: block;
    width: 40px;
    height: 2px;
    background: var(--gradient);
    margin: 0 auto 20px;
    border-radius: var(--radius-pill);
}

/* ── Upload form ── */
#fileForm {
    display: flex;
    justify-content: center;
    margin-bottom: 8px;
}

input[type="file"] {
    display: none;
}

label[for="zipInput"] {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-pill);
    background: var(--gradient);
    color: #fff;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255, 60, 110, 0.35);
    transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
    user-select: none;
}

/* Upload icon via pseudo-element */
label[for="zipInput"]::before {
    content: "↑";
    font-size: 16px;
    font-weight: 700;
    line-height: 1;
}

label[for="zipInput"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(255, 60, 110, 0.5);
}

label[for="zipInput"]:active {
    transform: translateY(0);
    opacity: 0.85;
}

/* ── Results ── */
#results {
    margin-top: 36px;
}

/* Summary line */
#results > p {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-dark);
}

body.dark-mode #results > p { color: var(--text-secondary); border-color: var(--border-dark); }
body.light-mode #results > p { color: var(--text-secondary-l); border-color: var(--border-light); }

/* User item card */
#results .user-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    margin-bottom: 10px;
    transition:
        background-color var(--transition),
        border-color var(--transition),
        transform var(--transition);
    animation: fadeIn 0.3s ease both;
}

body.dark-mode #results .user-item {
    background: var(--glass-dark);
    border-color: var(--border-dark);
}

body.light-mode #results .user-item {
    background: #f6f8fb;
    border-color: var(--border-light);
}

#results .user-item:hover {
    transform: translateX(4px);
    border-color: var(--accent-a);
}

body.dark-mode #results .user-item:hover {
    background: rgba(255, 60, 110, 0.06);
}

body.light-mode #results .user-item:hover {
    background: #fff;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Stagger item animations */
#results .user-item:nth-child(1)  { animation-delay: 0.02s; }
#results .user-item:nth-child(2)  { animation-delay: 0.04s; }
#results .user-item:nth-child(3)  { animation-delay: 0.06s; }
#results .user-item:nth-child(4)  { animation-delay: 0.08s; }
#results .user-item:nth-child(5)  { animation-delay: 0.10s; }
#results .user-item:nth-child(6)  { animation-delay: 0.12s; }
#results .user-item:nth-child(7)  { animation-delay: 0.14s; }
#results .user-item:nth-child(8)  { animation-delay: 0.16s; }
#results .user-item:nth-child(9)  { animation-delay: 0.18s; }
#results .user-item:nth-child(10) { animation-delay: 0.20s; }

/* Profile pic */
.profile-pic {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    /* Gradient ring */
    outline: 2px solid transparent;
    outline-offset: 2px;
    background: var(--gradient);
    /* Fallback placeholder color */
    background-color: var(--text-muted);
}

/* Username link */
#results .user-item a {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.01em;
    transition: color var(--transition);
}

body.dark-mode #results .user-item a { color: var(--text-primary); }
body.light-mode #results .user-item a { color: var(--text-primary-l); }

#results .user-item a:hover {
    color: var(--accent-a);
}

/* "is not following you back" text */
#results .user-item span {
    font-size: 13px;
    font-weight: 300;
}

body.dark-mode #results .user-item span { color: var(--text-secondary); }
body.light-mode #results .user-item span { color: var(--text-secondary-l); }

/* Pill badge on hover — "Not following" */
#results .user-item::after {
    content: "not following";
    margin-left: auto;
    flex-shrink: 0;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 3px 10px;
    border-radius: var(--radius-pill);
    background: rgba(255, 60, 110, 0.12);
    color: var(--accent-a);
    border: 1px solid rgba(255, 60, 110, 0.2);
    white-space: nowrap;
    opacity: 0;
    transform: scale(0.9);
    transition: opacity var(--transition), transform var(--transition);
}

#results .user-item:hover::after {
    opacity: 1;
    transform: scale(1);
}

/* ── Footer ── */
footer {
    text-align: center;
    margin-top: 48px;
    font-size: 13px;
    font-weight: 300;
    letter-spacing: 0.02em;
}

body.dark-mode footer { color: var(--text-muted); }
body.light-mode footer { color: #aab; }

footer a {
    font-weight: 600;
    text-decoration: none;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: opacity var(--transition);
}

footer a:hover { opacity: 0.75; }

/* ── Responsive ── */
@media (max-width: 600px) {
    .container {
        padding: 32px 20px;
        border-radius: var(--radius-md);
    }

    .main-title {
        font-size: 28px;
    }

    #results .user-item::after {
        display: none; /* hide badge on small screens */
    }

    #results .user-item span {
        display: none; /* hide "is not following you back" text, redundant on mobile */
    }
}