/* ============================================================
   AUTH BASE STYLES — Termin-Bot Dortmund v1.5.1
   Shared by: login, register, forgot_password, reset_password,
              change_password
   Apple Design System
   ============================================================ */

:root {
    --blue: #007AFF;
    --blue-hover: #0056D6;
    --green: #34C759;
    --green-bg: rgba(52,199,89,0.08);
    --green-border: rgba(52,199,89,0.2);
    --bg: #f5f5f7;
    --card-bg: rgba(255,255,255,0.82);
    --text: #1d1d1f;
    --text-secondary: #86868b;
    --border: rgba(0,0,0,0.06);
    --input-bg: #f5f5f7;
    --input-border: rgba(0,0,0,0.1);
    --input-focus: rgba(0,122,255,0.25);
    --error-bg: #fff2f2;
    --error-text: #ff3b30;
    --error-border: rgba(255,59,48,0.15);
    --radius-card: 24px;
    --radius-input: 12px;
    --radius-btn: 980px;
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display',
            'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
    --shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-hover: 0 8px 40px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.06);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #000000;
        --card-bg: rgba(28,28,30,0.82);
        --text: #f5f5f7;
        --text-secondary: #86868b;
        --border: rgba(255,255,255,0.08);
        --input-bg: rgba(44,44,46,0.8);
        --input-border: rgba(255,255,255,0.1);
        --error-bg: rgba(255,59,48,0.12);
        --error-text: #ff453a;
        --error-border: rgba(255,59,48,0.2);
        --green-bg: rgba(52,199,89,0.12);
        --green-border: rgba(52,199,89,0.25);
        --shadow: 0 4px 24px rgba(0,0,0,0.3);
        --shadow-hover: 0 8px 40px rgba(0,0,0,0.5);
    }
}
html[data-theme="dark"] {
    --bg: #000000;
    --card-bg: rgba(28,28,30,0.82);
    --text: #f5f5f7;
    --text-secondary: #86868b;
    --border: rgba(255,255,255,0.08);
    --input-bg: rgba(44,44,46,0.8);
    --input-border: rgba(255,255,255,0.1);
    --error-bg: rgba(255,59,48,0.12);
    --error-text: #ff453a;
    --error-border: rgba(255,59,48,0.2);
    --green-bg: rgba(52,199,89,0.12);
    --green-border: rgba(52,199,89,0.25);
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 40px rgba(0,0,0,0.5);
}
html[data-theme="light"] {
    --bg: #f5f5f7;
    --card-bg: rgba(255,255,255,0.82);
    --text: #1d1d1f;
    --text-secondary: #86868b;
    --border: rgba(0,0,0,0.06);
    --input-bg: #f5f5f7;
    --input-border: rgba(0,0,0,0.1);
    --error-bg: #fff2f2;
    --error-text: #ff3b30;
    --error-border: rgba(255,59,48,0.15);
    --green-bg: rgba(52,199,89,0.08);
    --green-border: rgba(52,199,89,0.2);
    --shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-hover: 0 8px 40px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.06);
}

/* Theme Toggle – Smooth Transitions */
html.theme-shift,html.theme-shift *,html.theme-shift *::before,html.theme-shift *::after{transition:background-color .55s cubic-bezier(.25,.1,.25,1),color .4s .05s cubic-bezier(.25,.1,.25,1),border-color .4s cubic-bezier(.25,.1,.25,1),box-shadow .5s cubic-bezier(.25,.1,.25,1),fill .4s cubic-bezier(.25,.1,.25,1)!important}
@keyframes theme-pop{0%{transform:scale(1) rotate(0)}40%{transform:scale(.68) rotate(-14deg)}72%{transform:scale(1.1) rotate(4deg)}88%{transform:scale(.97)}100%{transform:scale(1) rotate(0)}}
.theme-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--card-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(0,0,0,.08);transition:transform .2s cubic-bezier(.25,.1,.25,1),box-shadow .35s cubic-bezier(.25,.1,.25,1),background-color .55s cubic-bezier(.25,.1,.25,1),border-color .4s cubic-bezier(.25,.1,.25,1);-webkit-appearance:none;appearance:none;padding:0;line-height:1;position:relative;z-index:99}
.theme-btn:active{transform:scale(.85)}
.theme-btn.pop{animation:theme-pop .52s cubic-bezier(.25,.1,.25,1)}
@media(hover:hover){.theme-btn:hover{box-shadow:0 4px 16px rgba(0,0,0,.12)}}

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

body {
    font-family: var(--font);
    background: var(--bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 24px;
}

/* Subtle background pattern */
body::before {
    content: '';
    position: fixed;
    top: -50%; left: -50%;
    width: 200%; height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(0,122,255,0.04) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(88,86,214,0.03) 0%, transparent 50%);
    z-index: -1;
    animation: bgShift 20s ease-in-out infinite alternate;
}
@keyframes bgShift {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(3%, 2%); }
}

/* ---- Glass Card ---- */
.auth-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow);
    padding: 48px 40px 40px;
    width: 440px;
    max-width: 100%;
    transition: box-shadow 0.4s ease;
    animation: cardIn 0.6s cubic-bezier(0.34,1.56,0.64,1) both;
}
.auth-card:hover { box-shadow: var(--shadow-hover); }

@keyframes cardIn {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---- Brand ---- */
.brand { text-align: center; margin-bottom: 32px; }
.brand-icon {
    font-size: 2.8rem;
    margin-bottom: 12px;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}
/* iOS Calendar Icon */
.cal-icon {
    width: 62px; height: 62px;
    border-radius: 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    box-shadow: 0 2px 12px rgba(0,0,0,.08);
    display: inline-flex; flex-direction: column;
    overflow: hidden; font-size: 1rem;
    position: relative;
}
.cal-header {
    background: #FF3B30;
    color: #fff;
    font-size: .6rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    text-align: center;
    padding: 3px 0 2px;
    line-height: 1;
}
.cal-day {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -.02em;
    color: var(--text);
    line-height: 1;
    padding-bottom: 2px;
}
.brand h1 {
    font-size: 1.65rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}
.brand .subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ---- Form ---- */
.form-group { margin-bottom: 20px; }

label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
input[type="email"] {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-input);
    background: var(--input-bg);
    font-size: 1rem;
    font-family: var(--font);
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
input::placeholder { color: var(--text-secondary); opacity: 0.6; }
input:focus {
    outline: none;
    border-color: var(--blue);
    box-shadow: 0 0 0 3px var(--input-focus);
    background: var(--card-bg);
}

/* ---- Password Toggle ---- */
.password-wrapper { position: relative; }
.password-wrapper input { padding-right: 48px; }
.password-toggle {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    line-height: 1;
    opacity: 0.5;
    transition: opacity 0.2s;
}
.password-toggle:hover { opacity: 0.8; }

/* ---- Hint & Divider ---- */
.hint {
    color: var(--text-secondary);
    font-size: 0.78rem;
    margin-top: 5px;
    letter-spacing: 0.01em;
    line-height: 1.4;
}
.divider {
    height: 1px;
    background: var(--border);
    margin: 20px 0;
}

/* ---- Submit Button ---- */
button[type="submit"] {
    width: 100%;
    padding: 14px;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: var(--radius-btn);
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, box-shadow 0.2s;
    margin-top: 8px;
}
button[type="submit"]:hover {
    background: var(--blue-hover);
    transform: scale(1.015);
    box-shadow: 0 4px 16px rgba(0,122,255,0.3);
}
button[type="submit"]:active { transform: scale(0.98); }

/* ---- Messages ---- */
.error-msg {
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-border);
    border-radius: var(--radius-input);
    padding: 12px 16px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 0.88rem;
    font-weight: 500;
    animation: shake 0.4s ease;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%      { transform: translateX(-6px); }
    40%      { transform: translateX(6px); }
    60%      { transform: translateX(-4px); }
    80%      { transform: translateX(4px); }
}

.success-msg {
    background: var(--green-bg);
    color: var(--green);
    border: 1px solid var(--green-border);
    border-radius: var(--radius-input);
    padding: 16px 20px;
    margin-bottom: 20px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    animation: successPop 0.5s cubic-bezier(0.34,1.56,0.64,1) both;
}
@keyframes successPop {
    from { opacity: 0; transform: scale(0.9); }
    to   { opacity: 1; transform: scale(1); }
}

/* ---- Footer Links ---- */
.footer-link {
    text-align: center;
    margin-top: 24px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}
.footer-link a {
    color: var(--blue);
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.2s;
}
.footer-link a:hover { opacity: 0.7; }

/* ---- Login Redirect (register success) ---- */
.login-redirect { text-align: center; margin-top: 16px; }
.login-redirect a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.05rem;
    transition: opacity 0.2s, transform 0.2s;
}
.login-redirect a:hover {
    opacity: 0.7;
    transform: translateX(3px);
}